New Carlisle
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the New Carlisle clear sky chart from 2005-11-06 to 2025-01-07.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	13% 10% 4 8% 5% 4 4 4 6% 7% 34%	104871
	Night	15% 11% 4 9% 5% 4 4 4 5% 6% 32%	104229
Transparency	Day	46% 7% 12% 21% 12% 1	108468
	Night	50% 7% 11% 19% 12% 1	108773
Seeing	Day	18% 15% 29% 22% 12% 4	15950
	Night	19% 12% 29% 28% 11% 1	25875

By Month

Percentage Cloud Cover SE (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	14% 19% 11% 13% 6% 5% 4 3 5% 5% 15%	2575
	11th to 20th	Day	14% 16% 9% 15% 7% 7% 6% 5% 6% 5% 8%	2530
	21st to end	Day	25% 23% 6% 11% 5% 4 4 2 3 4 12%	2783
February	1st to 10th	Day	15% 16% 6% 11% 8% 7% 4 3 4 5% 21%	1821
	11th to 20th	Day	14% 13% 5% 12% 8% 5% 5% 3 5% 5% 25%	1848
	21st to end	Day	15% 15% 7% 12% 5% 4 4 3 5% 5% 24%	1570
March	1st to 10th	Day	18% 14% 5% 8% 5% 5% 4 3 5% 6% 28%	3120
	11th to 20th	Day	11% 8% 6% 9% 6% 5% 5% 4 6% 8% 33%	3320
	21st to end	Day	19% 12% 7% 11% 6% 4 5% 3 5% 5% 24%	4037
April	1st to 10th	Day	16% 14% 3 7% 4 4 4 4 5% 7% 31%	2280
	11th to 20th	Day	16% 11% 3 6% 4 4 3 4 4 7% 38%	2254
	21st to end	Day	19% 9% 3 7% 4 4 3 3 6% 8% 33%	2460
May	1st to 10th	Day	18% 8% 2 6% 4 4 4 4 6% 8% 34%	4082
	11th to 20th	Day	14% 8% 3 7% 4 4 4 4 6% 8% 39%	4081
	21st to end	Day	9% 5% 3 7% 4 4 4 4 6% 9% 46%	4821
June	1st to 10th	Day	10% 6% 2 7% 4 5% 4 3 6% 8% 45%	2660
	11th to 20th	Day	9% 5% 2 6% 5% 4 5% 5% 6% 8% 45%	2660
	21st to end	Day	10% 6% 2 6% 5% 4 4 5% 7% 9% 42%	2660
July	1st to 10th	Day	11% 7% 3 8% 6% 4 5% 4 7% 9% 37%	4440
	11th to 20th	Day	7% 4 1 5% 4 4 5% 4 7% 10% 49%	4440
	21st to end	Day	7% 6% 2 7% 6% 5% 5% 5% 6% 8% 43%	4813
August	1st to 10th	Day	9% 5% 2 6% 4 4 4 4 6% 8% 48%	4149
	11th to 20th	Day	9% 5% 2 5% 4 5% 5% 4 7% 7% 47%	3926
	21st to end	Day	7% 5% 2 6% 5% 4 5% 4 7% 9% 47%	4180
September	1st to 10th	Day	9% 6% 2 6% 5% 4 5% 3 6% 8% 45%	2278
	11th to 20th	Day	11% 6% 2 5% 4 4 5% 4 7% 7% 47%	2090
	21st to end	Day	12% 8% 3 7% 4 5% 4 4 6% 8% 40%	2090
October	1st to 10th	Day	13% 6% 3 7% 5% 4 4 4 4 7% 44%	2090
	11th to 20th	Day	19% 8% 3 7% 4 4 4 4 6% 8% 34%	1873
	21st to end	Day	21% 11% 3 10% 6% 4 4 4 5% 6% 26%	1881
November	1st to 10th	Day	14% 10% 3 8% 4 4 4 4 6% 6% 37%	1762
	11th to 20th	Day	16% 16% 4 8% 7% 5% 5% 3 5% 6% 25%	1800
	21st to end	Day	20% 16% 6% 10% 5% 4 4 3 4 5% 24%	1800
December	1st to 10th	Day	10% 15% 5% 18% 6% 5% 4 4 4 6% 24%	2707
	11th to 20th	Day	15% 19% 10% 13% 6% 6% 3 3 5% 5% 15%	3008
	21st to end	Day	26% 21% 7% 14% 6% 4 3 3 3 3 10%	3982
January	1st to 10th	Night	16% 17% 9% 13% 7% 4 4 4 5% 5% 16%	4513
	11th to 20th	Night	15% 20% 8% 15% 7% 4 4 5% 6% 5% 12%	4440
	21st to end	Night	24% 18% 9% 12% 6% 4 3 3 4 4 13%	4884
February	1st to 10th	Night	16% 17% 5% 9% 8% 5% 4 3 5% 5% 23%	2356
	11th to 20th	Night	14% 12% 5% 11% 6% 5% 4 3 5% 7% 27%	2218
	21st to end	Night	19% 15% 5% 10% 5% 4 3 3 4 5% 26%	1884
March	1st to 10th	Night	17% 11% 4 9% 5% 5% 4 3 4 5% 33%	3733
	11th to 20th	Night	10% 7% 3 8% 5% 5% 4 4 5% 6% 42%	3626
	21st to end	Night	20% 11% 5% 10% 5% 4 5% 3 5% 5% 28%	3608
April	1st to 10th	Night	16% 9% 3 6% 5% 4 5% 4 5% 7% 36%	1900
	11th to 20th	Night	18% 9% 3 7% 4 4 4 3 5% 6% 37%	1875
	21st to end	Night	18% 8% 3 7% 4 5% 5% 5% 5% 6% 36%	1718
May	1st to 10th	Night	16% 8% 2 7% 5% 5% 5% 4 6% 7% 35%	2813
	11th to 20th	Night	17% 7% 3 6% 4 4 3 3 5% 8% 39%	2812
	21st to end	Night	14% 6% 3 6% 4 4 4 3 4 7% 44%	2743
June	1st to 10th	Night	9% 5% 2 6% 4 3 5% 3 6% 10% 48%	1520
	11th to 20th	Night	8% 6% 2 6% 5% 5% 5% 5% 6% 9% 45%	1520
	21st to end	Night	9% 5% 2 7% 5% 4 4 4 8% 8% 42%	1520
July	1st to 10th	Night	9% 5% 2 6% 5% 5% 5% 5% 7% 10% 42%	2530
	11th to 20th	Night	6% 5% 1 5% 3 3 4 3 6% 9% 55%	2530
	21st to end	Night	7% 5% 2 6% 4 6% 5% 5% 7% 9% 44%	2750
August	1st to 10th	Night	8% 6% 3 6% 4 4 5% 4 6% 8% 45%	2781
	11th to 20th	Night	9% 4 2 5% 4 4 4 4 5% 8% 49%	2899
	21st to end	Night	9% 5% 2 6% 4 4 5% 3 5% 8% 50%	3476
September	1st to 10th	Night	11% 5% 2 7% 4 4 3 4 5% 7% 49%	1900
	11th to 20th	Night	10% 4 1 5% 4 3 3 3 5% 8% 53%	2072
	21st to end	Night	13% 6% 2 7% 3 4 4 4 5% 7% 44%	2090
October	1st to 10th	Night	15% 5% 2 4 4 4 4 3 4 7% 47%	2090
	11th to 20th	Night	18% 10% 3 8% 4 4 3 3 4 5% 38%	2304
	21st to end	Night	23% 9% 3 7% 4 4 4 3 4 5% 34%	2717
November	1st to 10th	Night	15% 13% 4 6% 4 4 3 3 5% 5% 38%	2536
	11th to 20th	Night	14% 16% 4 10% 5% 4 5% 4 5% 5% 27%	2600
	21st to end	Night	18% 17% 6% 9% 5% 4 4 3 4 6% 25%	2600
December	1st to 10th	Night	12% 13% 5% 15% 6% 5% 5% 5% 6% 6% 22%	4476
	11th to 20th	Night	16% 19% 9% 14% 7% 5% 4 3 5% 4 13%	5199
	21st to end	Night	25% 20% 7% 11% 6% 4 4 3 4 5% 11%	6996

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	70% 8% 10% 10% 3	2576
	11th to 20th	Day	73% 7% 13% 5% 1	2530
	21st to end	Day	74% 7% 7% 9% 3	2783
February	1st to 10th	Day	65% 6% 11% 11% 6% 1	1821
	11th to 20th	Day	59% 8% 10% 16% 7%	1858
	21st to end	Day	60% 6% 12% 14% 6% 1	1570
March	1st to 10th	Day	56% 8% 9% 19% 8%	3120
	11th to 20th	Day	44% 9% 14% 25% 7% 1	3320
	21st to end	Day	60% 8% 12% 17% 3	4037
April	1st to 10th	Day	52% 6% 11% 20% 12%	2280
	11th to 20th	Day	46% 6% 10% 22% 13% 3	2254
	21st to end	Day	47% 7% 12% 19% 12% 3	2460
May	1st to 10th	Day	43% 9% 13% 24% 10% 1	4120
	11th to 20th	Day	39% 9% 14% 27% 10% 1	4085
	21st to end	Day	33% 8% 12% 23% 23% 1	4834
June	1st to 10th	Day	37% 7% 11% 25% 19% 2	2660
	11th to 20th	Day	34% 8% 12% 23% 19% 3	2660
	21st to end	Day	37% 9% 15% 20% 16% 3	2660
July	1st to 10th	Day	42% 7% 13% 20% 15% 3	4371
	11th to 20th	Day	28% 8% 16% 31% 16% 2	4365
	21st to end	Day	36% 10% 14% 18% 20% 3	4662
August	1st to 10th	Day	32% 7% 14% 30% 16% 1	4134
	11th to 20th	Day	32% 8% 12% 31% 16% 1	3965
	21st to end	Day	32% 7% 13% 26% 19% 3	4179
September	1st to 10th	Day	36% 7% 14% 23% 17% 4	2278
	11th to 20th	Day	33% 7% 13% 25% 19% 2	2090
	21st to end	Day	41% 7% 11% 23% 17% 1	2090
October	1st to 10th	Day	28% 5% 10% 33% 22% 1	3480
	11th to 20th	Day	38% 7% 12% 20% 23%	3089
	21st to end	Day	49% 5% 10% 24% 11% 2	3081
November	1st to 10th	Day	45% 7% 13% 20% 13% 1	1762
	11th to 20th	Day	60% 7% 9% 16% 7% 1	1800
	21st to end	Day	64% 6% 10% 16% 5%	1800
December	1st to 10th	Day	61% 7% 15% 15% 3	2707
	11th to 20th	Day	70% 7% 11% 10% 2	3005
	21st to end	Day	79% 5% 6% 8% 2	3982
January	1st to 10th	Night	66% 11% 10% 10% 2	4513
	11th to 20th	Night	73% 9% 10% 6% 2	4440
	21st to end	Night	73% 7% 10% 9% 2	4884
February	1st to 10th	Night	63% 6% 10% 13% 6% 1	2356
	11th to 20th	Night	55% 8% 11% 18% 8% 1	2219
	21st to end	Night	60% 6% 10% 15% 6% 2	1884
March	1st to 10th	Night	51% 8% 11% 22% 7%	3733
	11th to 20th	Night	39% 9% 12% 24% 14% 2	3626
	21st to end	Night	56% 8% 11% 18% 7% 1	3608
April	1st to 10th	Night	46% 8% 12% 20% 13% 1	1900
	11th to 20th	Night	47% 7% 8% 19% 17% 3	1875
	21st to end	Night	48% 7% 11% 18% 14% 3	1718
May	1st to 10th	Night	46% 8% 12% 23% 11% 1	2840
	11th to 20th	Night	41% 8% 13% 25% 13% 1	2813
	21st to end	Night	38% 8% 10% 18% 23% 2	2751
June	1st to 10th	Night	30% 8% 14% 28% 18% 3	1520
	11th to 20th	Night	34% 8% 13% 24% 19% 2	1520
	21st to end	Night	37% 8% 17% 21% 14% 2	1520
July	1st to 10th	Night	35% 8% 15% 24% 12% 6%	2490
	11th to 20th	Night	26% 8% 13% 23% 28% 2	2482
	21st to end	Night	33% 9% 16% 17% 22% 3	2662
August	1st to 10th	Night	34% 8% 14% 28% 15% 1	2772
	11th to 20th	Night	31% 9% 11% 28% 21% 1	2926
	21st to end	Night	33% 7% 10% 28% 20% 3	3476
September	1st to 10th	Night	34% 7% 12% 21% 19% 6%	1900
	11th to 20th	Night	29% 6% 8% 29% 25% 2	2072
	21st to end	Night	38% 6% 11% 25% 17% 2	2090
October	1st to 10th	Night	25% 6% 9% 32% 26% 1	3480
	11th to 20th	Night	42% 4 9% 21% 24% 1	3827
	21st to end	Night	42% 5% 9% 27% 16% 1	4467
November	1st to 10th	Night	48% 6% 10% 21% 14% 2	2536
	11th to 20th	Night	57% 7% 11% 16% 8% 1	2600
	21st to end	Night	62% 6% 10% 17% 5%	2600
December	1st to 10th	Night	60% 9% 15% 14% 3	4476
	11th to 20th	Night	73% 7% 10% 7% 2	5201
	21st to end	Night	75% 7% 9% 7% 2	6996

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	23% 22% 35% 15% 5% 1	288
	11th to 20th	Day	25% 20% 37% 13% 4 1	270
	21st to end	Day	26% 22% 31% 18% 3 1	297
February	1st to 10th	Day	27% 24% 33% 11% 5%	270
	11th to 20th	Day	27% 27% 31% 13% 1	270
	21st to end	Day	30% 29% 32% 6% 3	225
March	1st to 10th	Day	24% 27% 37% 10% 2	270
	11th to 20th	Day	26% 18% 33% 15% 7% 1	365
	21st to end	Day	30% 19% 30% 15% 6%	506
April	1st to 10th	Day	26% 20% 28% 21% 4 1	460
	11th to 20th	Day	24% 22% 28% 15% 9% 2	452
	21st to end	Day	25% 19% 31% 15% 7% 2	460
May	1st to 10th	Day	26% 14% 32% 18% 8% 2	463
	11th to 20th	Day	23% 12% 30% 21% 9% 4	487
	21st to end	Day	12% 13% 31% 25% 15% 4	731
June	1st to 10th	Day	12% 12% 31% 28% 13% 4	680
	11th to 20th	Day	12% 9% 30% 33% 13% 4	680
	21st to end	Day	14% 11% 32% 28% 12% 5%	680
July	1st to 10th	Day	10% 7% 24% 28% 21% 10%	671
	11th to 20th	Day	9% 6% 31% 26% 20% 8%	668
	21st to end	Day	7% 7% 26% 35% 18% 6%	739
August	1st to 10th	Day	8% 5% 20% 29% 25% 13%	519
	11th to 20th	Day	9% 7% 25% 26% 24% 8%	479
	21st to end	Day	8% 5% 22% 33% 23% 9%	539
September	1st to 10th	Day	12% 8% 23% 31% 20% 6%	490
	11th to 20th	Day	9% 6% 19% 29% 27% 10%	490
	21st to end	Day	18% 12% 21% 26% 15% 7%	490
October	1st to 10th	Day	16% 11% 29% 26% 15% 3	490
	11th to 20th	Day	23% 18% 32% 20% 5% 1	361
	21st to end	Day	34% 16% 34% 15% 1 1	330
November	1st to 10th	Day	14% 22% 38% 18% 5% 2	300
	11th to 20th	Day	29% 25% 28% 14% 4	300
	21st to end	Day	33% 18% 35% 12% 1	300
December	1st to 10th	Day	19% 33% 31% 12% 5% 1	300
	11th to 20th	Day	20% 29% 35% 12% 2 1	300
	21st to end	Day	25% 28% 37% 9% 2	330
January	1st to 10th	Night	24% 18% 35% 20% 4	981
	11th to 20th	Night	25% 16% 36% 19% 3	950
	21st to end	Night	22% 16% 36% 22% 4	1045
February	1st to 10th	Night	26% 14% 37% 20% 3	798
	11th to 20th	Night	20% 18% 36% 22% 4	743
	21st to end	Night	28% 17% 35% 16% 4	628
March	1st to 10th	Night	21% 17% 33% 23% 6% 1	760
	11th to 20th	Night	19% 13% 35% 27% 6%	760
	21st to end	Night	26% 11% 28% 30% 4	717
April	1st to 10th	Night	20% 14% 35% 24% 6% 1	570
	11th to 20th	Night	24% 12% 33% 25% 6% 1	563
	21st to end	Night	22% 10% 33% 26% 9% 1	570
May	1st to 10th	Night	22% 7% 31% 29% 10% 1	570
	11th to 20th	Night	19% 7% 26% 36% 13%	561
	21st to end	Night	14% 4 23% 39% 19% 1	617
June	1st to 10th	Night	9% 5% 28% 41% 16% 1	570
	11th to 20th	Night	11% 4 29% 39% 15% 1	570
	21st to end	Night	11% 5% 25% 38% 21% 1	570
July	1st to 10th	Night	8% 2 15% 44% 27% 4	555
	11th to 20th	Night	9% 4 21% 35% 27% 4	552
	21st to end	Night	6% 2 17% 44% 29% 2	624
August	1st to 10th	Night	6% 2 14% 46% 28% 3	567
	11th to 20th	Night	7% 3 15% 42% 28% 4	564
	21st to end	Night	9% 3 16% 40% 30% 3	627
September	1st to 10th	Night	12% 5% 17% 39% 24% 4	570
	11th to 20th	Night	11% 4 19% 36% 27% 4	742
	21st to end	Night	16% 8% 24% 29% 20% 3	760
October	1st to 10th	Night	15% 8% 26% 30% 19% 1	760
	11th to 20th	Night	22% 16% 28% 27% 7% 1	760
	21st to end	Night	28% 14% 29% 23% 6%	836
November	1st to 10th	Night	21% 15% 31% 23% 9% 1	780
	11th to 20th	Night	24% 20% 32% 20% 4 1	800
	21st to end	Night	27% 18% 30% 21% 5%	800
December	1st to 10th	Night	24% 20% 36% 16% 4	935
	11th to 20th	Night	24% 16% 36% 21% 3	1000
	21st to end	Night	30% 18% 33% 17% 2	1100

Page generated at 2025-01-04 03:24:00. Version ac07

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