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 2026-05-02.

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 9% 5% 5% 4 4 6% 7% 33%	131313
	Night	14% 11% 5% 10% 5% 5% 4 4 5% 6% 31%	131414
Transparency	Day	47% 7% 12% 21% 12% 1	134865
	Night	51% 7% 11% 19% 11% 1	135937
Seeing	Day	18% 15% 29% 22% 11% 4	17722
	Night	19% 12% 29% 27% 11% 1	27675

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	13% 17% 10% 21% 7% 4 4 3 4 5% 12%	4691
	11th to 20th	Day	10% 13% 9% 18% 9% 8% 7% 4 5% 5% 12%	4710
	21st to end	Day	16% 17% 5% 13% 8% 6% 5% 3 4 5% 18%	5156
February	1st to 10th	Day	14% 16% 6% 12% 8% 7% 5% 3 4 5% 21%	2013
	11th to 20th	Day	14% 13% 5% 12% 8% 5% 5% 3 5% 5% 24%	2048
	21st to end	Day	14% 14% 7% 12% 5% 4 4 3 5% 5% 24%	1730
March	1st to 10th	Day	17% 12% 5% 11% 4 4 3 3 4 5% 32%	4580
	11th to 20th	Day	9% 9% 6% 8% 5% 5% 5% 4 5% 8% 37%	4855
	21st to end	Day	18% 15% 7% 11% 6% 5% 4 3 5% 5% 22%	5911
April	1st to 10th	Day	17% 14% 3 7% 4 4 4 4 5% 6% 31%	2520
	11th to 20th	Day	15% 11% 3 6% 5% 4 3 4 5% 7% 37%	2494
	21st to end	Day	18% 10% 3 6% 4 4 3 3 6% 9% 34%	2720
May	1st to 10th	Day	18% 9% 3 7% 4 4 4 4 6% 8% 33%	5875
	11th to 20th	Day	14% 7% 3 7% 4 4 4 4 6% 8% 38%	5861
	21st to end	Day	14% 6% 3 7% 4 4 4 3 5% 8% 43%	6932
June	1st to 10th	Day	11% 6% 2 6% 4 5% 4 3 6% 8% 45%	2800
	11th to 20th	Day	9% 5% 3 6% 5% 4 5% 5% 6% 8% 44%	2800
	21st to end	Day	10% 6% 2 6% 5% 4 4 5% 7% 9% 43%	2800
July	1st to 10th	Day	9% 6% 3 7% 5% 4 5% 4 7% 9% 40%	6360
	11th to 20th	Day	8% 5% 2 6% 4 5% 5% 5% 7% 10% 43%	6360
	21st to end	Day	9% 6% 2 7% 5% 5% 5% 5% 6% 9% 41%	6924
August	1st to 10th	Day	8% 5% 2 6% 4 4 4 4 6% 8% 49%	4280
	11th to 20th	Day	9% 5% 2 5% 4 5% 5% 4 7% 8% 46%	4052
	21st to end	Day	6% 4 2 6% 5% 4 5% 4 7% 9% 47%	4312
September	1st to 10th	Day	9% 6% 2 6% 5% 4 5% 3 6% 8% 46%	2398
	11th to 20th	Day	11% 6% 2 5% 4 4 5% 4 6% 7% 48%	2200
	21st to end	Day	11% 8% 3 7% 4 5% 4 4 5% 8% 40%	2200
October	1st to 10th	Day	13% 6% 2 7% 5% 4 4 4 4 7% 44%	2200
	11th to 20th	Day	19% 7% 3 7% 4 4 4 4 6% 8% 34%	1971
	21st to end	Day	20% 10% 3 9% 6% 4 4 4 5% 7% 27%	1980
November	1st to 10th	Day	14% 10% 3 8% 4 4 4 4 6% 6% 37%	1852
	11th to 20th	Day	16% 16% 4 8% 7% 5% 4 3 5% 6% 26%	1890
	21st to end	Day	19% 17% 6% 10% 5% 4 4 3 4 5% 24%	1890
December	1st to 10th	Day	10% 15% 5% 18% 6% 5% 4 4 4 6% 24%	2790
	11th to 20th	Day	15% 18% 10% 13% 6% 6% 3 3 5% 5% 15%	3088
	21st to end	Day	25% 21% 7% 14% 6% 4 3 3 3 3 10%	4070
January	1st to 10th	Night	12% 17% 9% 20% 6% 4 4 3 5% 5% 14%	8232
	11th to 20th	Night	11% 18% 8% 17% 8% 7% 6% 4 5% 5% 11%	8280
	21st to end	Night	16% 15% 7% 12% 7% 6% 5% 4 4 5% 19%	9058
February	1st to 10th	Night	15% 16% 5% 10% 8% 5% 5% 3 5% 5% 23%	2604
	11th to 20th	Night	14% 12% 5% 12% 6% 5% 4 3 5% 7% 26%	2458
	21st to end	Night	18% 15% 5% 11% 5% 4 3 3 4 5% 27%	2076
March	1st to 10th	Night	15% 11% 5% 10% 5% 4 4 3 4 5% 33%	5493
	11th to 20th	Night	12% 8% 3 8% 4 5% 4 4 4 6% 42%	5311
	21st to end	Night	18% 12% 4 10% 5% 4 4 3 5% 5% 30%	5289
April	1st to 10th	Night	16% 9% 3 7% 5% 4 5% 4 5% 7% 34%	2100
	11th to 20th	Night	18% 9% 3 7% 4 4 4 3 5% 6% 37%	2075
	21st to end	Night	17% 8% 3 6% 4 5% 4 5% 5% 6% 37%	1898
May	1st to 10th	Night	19% 10% 3 8% 5% 4 4 3 5% 6% 34%	4042
	11th to 20th	Night	16% 7% 3 6% 4 4 3 3 5% 8% 41%	4032
	21st to end	Night	17% 7% 3 7% 4 3 4 3 4 6% 41%	3942
June	1st to 10th	Night	10% 5% 2 6% 3 3 5% 3 6% 9% 47%	1600
	11th to 20th	Night	9% 6% 2 6% 4 5% 5% 5% 6% 9% 44%	1600
	21st to end	Night	8% 5% 2 7% 5% 4 4 4 8% 9% 43%	1600
July	1st to 10th	Night	9% 6% 2 6% 4 5% 4 5% 7% 10% 43%	3618
	11th to 20th	Night	6% 5% 2 6% 5% 4 4 4 6% 8% 49%	3617
	21st to end	Night	9% 6% 2 6% 4 5% 5% 4 6% 9% 43%	3947
August	1st to 10th	Night	8% 5% 3 6% 4 4 5% 4 6% 9% 46%	2869
	11th to 20th	Night	9% 4 2 6% 4 4 4 4 5% 8% 49%	2992
	21st to end	Night	9% 6% 2 6% 4 3 5% 3 5% 8% 50%	3586
September	1st to 10th	Night	10% 5% 2 7% 4 4 3 4 5% 7% 50%	2000
	11th to 20th	Night	10% 4 1 4 4 3 3 3 5% 8% 55%	2181
	21st to end	Night	13% 7% 2 7% 4 4 4 4 5% 7% 45%	2200
October	1st to 10th	Night	15% 5% 2 4 4 4 4 3 4 7% 48%	2200
	11th to 20th	Night	17% 10% 3 8% 4 4 3 3 4 6% 38%	2426
	21st to end	Night	22% 10% 3 7% 4 4 4 4 4 5% 34%	2860
November	1st to 10th	Night	14% 13% 4 6% 4 4 3 3 5% 5% 38%	2666
	11th to 20th	Night	14% 15% 4 10% 5% 4 5% 4 5% 6% 27%	2730
	21st to end	Night	19% 17% 6% 9% 5% 4 4 3 3 6% 25%	2730
December	1st to 10th	Night	12% 13% 5% 15% 6% 5% 5% 5% 6% 6% 21%	4613
	11th to 20th	Night	16% 19% 9% 14% 7% 5% 4 3 5% 4 13%	5339
	21st to end	Night	25% 20% 7% 12% 6% 4 4 3 4 5% 11%	7150

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	74% 6% 9% 9% 2	4692
	11th to 20th	Day	71% 6% 11% 8% 3	4710
	21st to end	Day	66% 7% 10% 12% 4	5156
February	1st to 10th	Day	65% 6% 11% 11% 5% 1	2013
	11th to 20th	Day	60% 8% 10% 15% 7%	2058
	21st to end	Day	60% 6% 12% 14% 7% 1	1730
March	1st to 10th	Day	54% 6% 9% 22% 9%	4580
	11th to 20th	Day	43% 7% 14% 29% 7% 1	4855
	21st to end	Day	63% 7% 10% 14% 5% 1	5913
April	1st to 10th	Day	53% 6% 10% 19% 11%	2520
	11th to 20th	Day	47% 6% 11% 22% 12% 3	2494
	21st to end	Day	46% 7% 12% 21% 12% 2	2720
May	1st to 10th	Day	46% 8% 11% 21% 13% 1	5910
	11th to 20th	Day	40% 8% 13% 24% 13% 1	5865
	21st to end	Day	38% 6% 10% 27% 18% 1	6946
June	1st to 10th	Day	37% 7% 11% 24% 19% 2	2800
	11th to 20th	Day	35% 8% 12% 23% 19% 3	2800
	21st to end	Day	36% 9% 15% 21% 16% 3	2800
July	1st to 10th	Day	38% 6% 12% 25% 17% 2	6291
	11th to 20th	Day	33% 8% 15% 28% 15% 1	6285
	21st to end	Day	37% 9% 13% 23% 17% 2	6728
August	1st to 10th	Day	32% 7% 14% 31% 16% 1	4265
	11th to 20th	Day	33% 8% 12% 30% 16% 1	4091
	21st to end	Day	32% 7% 13% 27% 19% 3	4311
September	1st to 10th	Day	35% 7% 13% 24% 17% 3	2398
	11th to 20th	Day	32% 7% 13% 26% 20% 2	2200
	21st to end	Day	40% 7% 11% 24% 17% 1	2200
October	1st to 10th	Day	28% 5% 10% 33% 23% 1	3590
	11th to 20th	Day	38% 7% 11% 21% 23%	3187
	21st to end	Day	48% 5% 10% 23% 11% 2	3180
November	1st to 10th	Day	44% 7% 13% 21% 13% 1	1852
	11th to 20th	Day	60% 7% 9% 17% 7% 1	1890
	21st to end	Day	64% 5% 10% 16% 4	1890
December	1st to 10th	Day	61% 7% 15% 15% 3	2790
	11th to 20th	Day	70% 7% 11% 11% 2	3085
	21st to end	Day	79% 5% 7% 8% 2	4070
January	1st to 10th	Night	70% 9% 8% 11% 2	8233
	11th to 20th	Night	73% 8% 10% 7% 2	8280
	21st to end	Night	65% 7% 12% 11% 4	9058
February	1st to 10th	Night	62% 6% 10% 14% 6% 1	2604
	11th to 20th	Night	56% 8% 10% 18% 8% 1	2459
	21st to end	Night	59% 6% 11% 16% 6% 2	2076
March	1st to 10th	Night	52% 6% 11% 24% 6% 1	5493
	11th to 20th	Night	41% 7% 12% 27% 11% 2	5311
	21st to end	Night	54% 7% 9% 20% 9% 1	5289
April	1st to 10th	Night	47% 8% 12% 20% 13% 1	2100
	11th to 20th	Night	47% 6% 9% 19% 16% 3	2075
	21st to end	Night	46% 7% 11% 21% 13% 2	1898
May	1st to 10th	Night	50% 7% 9% 18% 13% 3	4069
	11th to 20th	Night	40% 7% 13% 23% 14% 2	4033
	21st to end	Night	43% 7% 9% 20% 19% 1	3950
June	1st to 10th	Night	30% 8% 13% 28% 17% 3	1600
	11th to 20th	Night	35% 8% 14% 23% 18% 2	1600
	21st to end	Night	35% 8% 17% 22% 15% 2	1600
July	1st to 10th	Night	35% 7% 12% 29% 13% 4	3580
	11th to 20th	Night	31% 8% 14% 21% 24% 2	3572
	21st to end	Night	36% 8% 14% 21% 19% 2	3832
August	1st to 10th	Night	33% 8% 15% 28% 15% 1	2860
	11th to 20th	Night	31% 9% 12% 28% 20% 1	3019
	21st to end	Night	33% 7% 10% 28% 20% 3	3586
September	1st to 10th	Night	34% 7% 12% 23% 19% 5%	2000
	11th to 20th	Night	28% 6% 8% 30% 26% 2	2181
	21st to end	Night	38% 6% 11% 25% 18% 2	2200
October	1st to 10th	Night	25% 5% 9% 32% 27% 1	3590
	11th to 20th	Night	41% 5% 9% 21% 24% 1	3949
	21st to end	Night	42% 5% 9% 27% 17% 1	4610
November	1st to 10th	Night	48% 6% 10% 21% 14% 2	2666
	11th to 20th	Night	56% 7% 11% 17% 8% 1	2730
	21st to end	Night	62% 6% 10% 17% 5%	2730
December	1st to 10th	Night	60% 9% 14% 13% 3	4613
	11th to 20th	Night	73% 7% 9% 7% 2	5341
	21st to end	Night	75% 6% 9% 7% 2	7150

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	22% 22% 35% 15% 5% 1	330
	11th to 20th	Day	24% 22% 38% 11% 3 1	330
	21st to end	Day	25% 24% 33% 15% 2 1	363
February	1st to 10th	Day	25% 25% 33% 12% 5% 1	330
	11th to 20th	Day	27% 28% 31% 13% 1	330
	21st to end	Day	29% 30% 32% 5% 3	273
March	1st to 10th	Day	24% 26% 39% 9% 2	330
	11th to 20th	Day	28% 19% 33% 14% 6%	435
	21st to end	Day	29% 20% 31% 14% 5%	594
April	1st to 10th	Day	28% 21% 28% 18% 3 1	540
	11th to 20th	Day	24% 23% 28% 14% 8% 2	532
	21st to end	Day	24% 19% 32% 16% 8% 2	540
May	1st to 10th	Day	26% 15% 31% 19% 7% 2	507
	11th to 20th	Day	22% 13% 30% 21% 9% 4	527
	21st to end	Day	13% 13% 32% 24% 14% 4	786
June	1st to 10th	Day	13% 13% 31% 27% 13% 4	730
	11th to 20th	Day	13% 9% 30% 33% 12% 3	730
	21st to end	Day	13% 11% 31% 29% 12% 4	730
July	1st to 10th	Day	10% 7% 25% 29% 21% 10%	721
	11th to 20th	Day	10% 6% 31% 26% 19% 7%	718
	21st to end	Day	8% 7% 26% 35% 18% 6%	794
August	1st to 10th	Day	8% 4 20% 29% 26% 12%	560
	11th to 20th	Day	9% 8% 24% 27% 24% 8%	519
	21st to end	Day	8% 6% 22% 33% 23% 8%	583
September	1st to 10th	Day	12% 8% 22% 30% 21% 6%	530
	11th to 20th	Day	9% 6% 18% 28% 28% 11%	530
	21st to end	Day	18% 12% 22% 25% 17% 7%	530
October	1st to 10th	Day	15% 11% 28% 27% 17% 3	530
	11th to 20th	Day	23% 18% 32% 22% 5% 1	394
	21st to end	Day	32% 15% 36% 16% 1 1	363
November	1st to 10th	Day	15% 22% 39% 17% 5% 2	330
	11th to 20th	Day	30% 25% 27% 14% 4	330
	21st to end	Day	33% 19% 35% 12% 1	330
December	1st to 10th	Day	19% 32% 31% 12% 5% 1	330
	11th to 20th	Day	21% 30% 35% 12% 2 1	330
	21st to end	Day	25% 28% 36% 9% 2	363
January	1st to 10th	Night	23% 18% 35% 20% 4	1050
	11th to 20th	Night	24% 18% 37% 17% 3	1050
	21st to end	Night	22% 18% 37% 21% 3	1155
February	1st to 10th	Night	25% 15% 36% 21% 3	882
	11th to 20th	Night	20% 19% 35% 22% 4	823
	21st to end	Night	26% 17% 37% 16% 4	692
March	1st to 10th	Night	21% 17% 34% 22% 5% 1	840
	11th to 20th	Night	21% 13% 34% 25% 6%	840
	21st to end	Night	26% 11% 30% 29% 4	793
April	1st to 10th	Night	20% 16% 34% 23% 6% 1	630
	11th to 20th	Night	23% 13% 32% 25% 7% 1	623
	21st to end	Night	21% 10% 33% 26% 9% 1	630
May	1st to 10th	Night	22% 7% 31% 29% 10% 1	603
	11th to 20th	Night	18% 7% 27% 35% 13%	591
	21st to end	Night	14% 5% 23% 39% 18% 1	650
June	1st to 10th	Night	10% 6% 27% 40% 16% 1	600
	11th to 20th	Night	12% 4 29% 40% 14% 1	600
	21st to end	Night	10% 5% 25% 39% 21% 1	600
July	1st to 10th	Night	8% 3 15% 45% 27% 4	585
	11th to 20th	Night	9% 5% 21% 36% 26% 4	582
	21st to end	Night	7% 2 17% 43% 29% 2	657
August	1st to 10th	Night	6% 2 14% 47% 28% 3	597
	11th to 20th	Night	8% 4 15% 41% 28% 4	594
	21st to end	Night	9% 3 16% 41% 29% 3	660
September	1st to 10th	Night	12% 5% 17% 37% 24% 4	600
	11th to 20th	Night	10% 3 18% 36% 28% 4	781
	21st to end	Night	15% 8% 24% 29% 21% 3	800
October	1st to 10th	Night	15% 8% 26% 31% 20% 1	800
	11th to 20th	Night	22% 15% 28% 27% 7% 1	800
	21st to end	Night	28% 14% 29% 23% 6%	880
November	1st to 10th	Night	21% 15% 33% 22% 9%	820
	11th to 20th	Night	23% 21% 31% 20% 4 1	840
	21st to end	Night	27% 18% 29% 21% 4	840
December	1st to 10th	Night	24% 20% 36% 17% 4	982
	11th to 20th	Night	24% 17% 36% 20% 3	1050
	21st to end	Night	30% 19% 33% 17% 2	1155

Page generated at 2026-04-29 02:21:42. Version ac07

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