Las Animas
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Las Animas 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	5% 4 1 4 3 3 3 3 5% 7% 62%	140195
	Night	6% 5% 2 5% 3 3 4 3 5% 7% 56%	139758
Transparency	Day	21% 4 9% 24% 27% 13%	135245
	Night	26% 4 9% 23% 26% 11%	135732
Seeing	Day	7% 6% 22% 33% 24% 8%	17458
	Night	7% 6% 31% 42% 13% 1	27553

By Month

Percentage Cloud Cover SW (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	4 8% 3 5% 3 3 4 3 5% 6% 56%	4720
	11th to 20th	Day	2 4 1 5% 3 4 4 3 4 7% 63%	4740
	21st to end	Day	3 7% 2 4 3 3 3 3 4 6% 61%	5822
February	1st to 10th	Day	4 7% 2 5% 4 4 3 3 4 7% 56%	2074
	11th to 20th	Day	2 5% 3 6% 4 4 3 4 5% 7% 57%	2049
	21st to end	Day	4 4 2 5% 3 3 3 3 4 5% 63%	1730
March	1st to 10th	Day	4 4 2 4 4 3 3 3 3 5% 66%	4600
	11th to 20th	Day	7% 5% 1 4 3 3 3 3 4 7% 59%	4768
	21st to end	Day	4 4 1 4 3 3 4 4 5% 7% 61%	6101
April	1st to 10th	Day	6% 4 1 3 3 3 3 3 5% 6% 63%	2520
	11th to 20th	Day	7% 4 2 4 3 3 3 4 5% 7% 57%	2491
	21st to end	Day	8% 5% 2 4 3 3 4 4 5% 8% 54%	2520
May	1st to 10th	Day	11% 4 1 4 3 3 3 3 5% 6% 56%	5910
	11th to 20th	Day	4 3 1 3 3 3 3 3 4 7% 66%	5862
	21st to end	Day	9% 4 1 3 3 2 3 3 5% 7% 61%	6785
June	1st to 10th	Day	5% 2 1 3 3 3 4 4 8% 11% 57%	2800
	11th to 20th	Day	5% 2 1 3 3 3 3 3 6% 7% 65%	2800
	21st to end	Day	4 3 1 3 4 4 5% 4 7% 10% 57%	2800
July	1st to 10th	Day	4 2 1 3 3 4 4 4 6% 8% 62%	6339
	11th to 20th	Day	2 1 1 3 2 3 4 4 6% 10% 65%	6340
	21st to end	Day	3 2 1 4 4 3 5% 5% 8% 10% 55%	6903
August	1st to 10th	Day	5% 3 1 3 3 3 5% 4 7% 10% 55%	5408
	11th to 20th	Day	3 2 1 3 3 3 3 3 6% 9% 63%	5366
	21st to end	Day	5% 3 1 5% 3 4 5% 4 6% 10% 54%	5984
September	1st to 10th	Day	5% 3 1 3 3 2 3 3 5% 6% 66%	2400
	11th to 20th	Day	4 3 1 3 2 2 4 2 4 7% 67%	2279
	21st to end	Day	5% 2 2 3 2 3 3 3 4 6% 68%	2200
October	1st to 10th	Day	4 2 1 2 1 2 2 2 3 5% 77%	3569
	11th to 20th	Day	5% 3 1 2 2 3 3 4 6% 69%	3250
	21st to end	Day	5% 3 1 3 2 2 2 1 2 4 74%	3295
November	1st to 10th	Day	5% 3 1 2 2 2 2 2 4 6% 70%	1853
	11th to 20th	Day	3 4 1 3 2 2 3 3 3 5% 70%	1890
	21st to end	Day	6% 5% 2 4 3 2 3 3 3 5% 64%	1890
December	1st to 10th	Day	2 5% 1 3 2 2 2 2 3 6% 71%	2939
	11th to 20th	Day	3 4 1 3 2 2 4 3 6% 8% 65%	3106
	21st to end	Day	5% 6% 2 7% 3 3 3 3 4 6% 57%	4092
January	1st to 10th	Night	5% 8% 3 6% 3 4 4 4 5% 7% 52%	8201
	11th to 20th	Night	2 5% 2 5% 3 3 3 3 4 7% 64%	8250
	21st to end	Night	3 7% 3 5% 3 3 3 3 4 6% 60%	8448
February	1st to 10th	Night	5% 6% 2 5% 4 3 3 2 4 7% 59%	2544
	11th to 20th	Night	4 8% 3 5% 3 3 4 3 5% 8% 52%	2458
	21st to end	Night	4 5% 1 4 3 2 3 3 4 7% 63%	2076
March	1st to 10th	Night	5% 6% 1 3 2 3 2 3 4 6% 65%	5494
	11th to 20th	Night	7% 6% 2 5% 3 3 4 3 5% 7% 54%	5416
	21st to end	Night	7% 5% 2 5% 4 4 4 4 6% 7% 52%	5094
April	1st to 10th	Night	6% 5% 2 5% 4 3 3 3 5% 7% 58%	2100
	11th to 20th	Night	8% 5% 2 4 3 3 3 3 6% 8% 55%	2077
	21st to end	Night	11% 5% 1 5% 4 3 4 3 5% 7% 53%	2100
May	1st to 10th	Night	12% 5% 2 5% 3 3 3 3 4 7% 51%	4090
	11th to 20th	Night	9% 5% 2 5% 3 3 4 3 5% 7% 55%	4053
	21st to end	Night	13% 6% 2 5% 4 3 3 3 5% 6% 50%	4109
June	1st to 10th	Night	4 3 1 3 4 4 5% 5% 8% 10% 54%	1600
	11th to 20th	Night	5% 3 2 4 4 3 5% 4 6% 8% 57%	1600
	21st to end	Night	6% 4 1 7% 4 5% 4 4 8% 9% 48%	1600
July	1st to 10th	Night	6% 3 2 5% 5% 5% 5% 4 7% 9% 47%	3640
	11th to 20th	Night	6% 3 2 6% 5% 5% 6% 5% 8% 10% 47%	3640
	21st to end	Night	6% 4 2 6% 5% 6% 6% 5% 8% 10% 41%	3970
August	1st to 10th	Night	9% 5% 2 7% 5% 5% 6% 5% 8% 9% 38%	4385
	11th to 20th	Night	5% 3 1 6% 5% 4 6% 5% 8% 12% 46%	4483
	21st to end	Night	9% 4 2 6% 5% 4 6% 5% 9% 9% 40%	4993
September	1st to 10th	Night	4 3 2 5% 3 3 4 4 5% 7% 60%	2000
	11th to 20th	Night	5% 3 2 4 3 3 3 4 5% 8% 61%	2120
	21st to end	Night	6% 4 1 4 3 3 3 3 4 6% 63%	2200
October	1st to 10th	Night	5% 2 1 3 3 2 3 3 5% 5% 68%	3608
	11th to 20th	Night	8% 2 1 3 2 2 3 3 5% 7% 63%	3898
	21st to end	Night	4 4 1 3 3 3 2 2 3 4 70%	4470
November	1st to 10th	Night	4 3 1 2 2 2 2 3 4 6% 70%	2665
	11th to 20th	Night	4 4 1 4 2 2 2 2 4 4 71%	2730
	21st to end	Night	4 6% 2 4 3 3 3 2 5% 6% 63%	2730
December	1st to 10th	Night	2 4 1 4 2 2 3 2 3 5% 71%	4467
	11th to 20th	Night	3 4 1 4 3 3 3 3 5% 7% 64%	5321
	21st to end	Night	5% 6% 2 5% 4 4 4 3 5% 7% 54%	7128

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	30% 3 6% 32% 22% 7%	4723
	11th to 20th	Day	23% 3 9% 24% 31% 11%	4740
	21st to end	Day	25% 2 8% 25% 31% 8%	5822
February	1st to 10th	Day	29% 4 8% 26% 23% 10%	2074
	11th to 20th	Day	27% 4 8% 26% 27% 8%	2059
	21st to end	Day	24% 2 5% 20% 30% 19%	1730
March	1st to 10th	Day	21% 3 5% 15% 33% 23%	4600
	11th to 20th	Day	25% 3 6% 18% 36% 12%	4768
	21st to end	Day	22% 4 8% 37% 24% 6%	6101
April	1st to 10th	Day	22% 4 8% 24% 26% 16%	2520
	11th to 20th	Day	26% 4 9% 25% 21% 16%	2494
	21st to end	Day	28% 4 9% 24% 24% 10%	2520
May	1st to 10th	Day	28% 5% 10% 25% 22% 11%	5910
	11th to 20th	Day	19% 4 9% 21% 27% 20%	5866
	21st to end	Day	23% 5% 13% 23% 22% 14%	6786
June	1st to 10th	Day	20% 5% 15% 29% 22% 10%	2800
	11th to 20th	Day	18% 3 9% 22% 25% 23%	2800
	21st to end	Day	21% 5% 9% 23% 25% 17%	2800
July	1st to 10th	Day	18% 5% 10% 20% 31% 15%	6271
	11th to 20th	Day	15% 5% 16% 26% 28% 10%	6265
	21st to end	Day	22% 7% 15% 22% 22% 13%	6705
August	1st to 10th	Day	23% 7% 19% 29% 15% 7%	3937
	11th to 20th	Day	18% 5% 14% 23% 28% 12%	3882
	21st to end	Day	20% 7% 11% 30% 23% 11%	4311
September	1st to 10th	Day	20% 4 9% 23% 27% 17%	2400
	11th to 20th	Day	17% 4 7% 22% 27% 23%	2279
	21st to end	Day	18% 3 7% 20% 34% 18%	2200
October	1st to 10th	Day	14% 2 5% 17% 35% 27%	3569
	11th to 20th	Day	17% 3 10% 23% 34% 13%	3250
	21st to end	Day	18% 2 4 22% 37% 18%	3295
November	1st to 10th	Day	17% 2 7% 26% 30% 18%	1853
	11th to 20th	Day	18% 2 5% 28% 35% 12%	1890
	21st to end	Day	24% 3 7% 20% 31% 16%	1890
December	1st to 10th	Day	17% 2 6% 34% 32% 8%	2939
	11th to 20th	Day	17% 3 7% 30% 37% 7%	3104
	21st to end	Day	29% 3 6% 26% 28% 8%	4092
January	1st to 10th	Night	31% 3 7% 30% 24% 5%	8202
	11th to 20th	Night	22% 2 10% 27% 27% 12%	8250
	21st to end	Night	26% 3 9% 23% 32% 7%	8448
February	1st to 10th	Night	27% 3 9% 24% 26% 11%	2544
	11th to 20th	Night	30% 4 10% 25% 24% 8%	2458
	21st to end	Night	22% 3 5% 23% 31% 17%	2076
March	1st to 10th	Night	21% 3 4 17% 32% 23%	5494
	11th to 20th	Night	30% 3 9% 15% 25% 18%	5416
	21st to end	Night	29% 4 10% 29% 22% 6%	5094
April	1st to 10th	Night	26% 4 7% 22% 25% 15%	2100
	11th to 20th	Night	28% 5% 9% 23% 22% 13%	2077
	21st to end	Night	32% 5% 11% 23% 21% 8%	2100
May	1st to 10th	Night	32% 6% 15% 21% 17% 10%	4090
	11th to 20th	Night	28% 5% 12% 20% 19% 16%	4054
	21st to end	Night	34% 6% 12% 20% 17% 12%	4110
June	1st to 10th	Night	22% 7% 20% 27% 15% 10%	1600
	11th to 20th	Night	23% 6% 12% 21% 20% 18%	1600
	21st to end	Night	30% 6% 10% 19% 23% 12%	1600
July	1st to 10th	Night	31% 7% 12% 24% 22% 5%	3600
	11th to 20th	Night	31% 6% 16% 20% 23% 4	3592
	21st to end	Night	35% 8% 13% 16% 21% 7%	3856
August	1st to 10th	Night	41% 9% 14% 20% 11% 5%	3193
	11th to 20th	Night	31% 9% 16% 22% 18% 4	3243
	21st to end	Night	29% 8% 12% 27% 17% 7%	3597
September	1st to 10th	Night	23% 5% 11% 22% 23% 15%	2000
	11th to 20th	Night	20% 5% 10% 22% 24% 20%	2120
	21st to end	Night	22% 4 6% 18% 32% 18%	2200
October	1st to 10th	Night	17% 3 8% 17% 31% 23%	3608
	11th to 20th	Night	21% 3 7% 25% 27% 17%	3898
	21st to end	Night	20% 2 5% 19% 39% 14%	4470
November	1st to 10th	Night	16% 2 8% 23% 31% 19%	2665
	11th to 20th	Night	18% 2 5% 24% 36% 15%	2730
	21st to end	Night	24% 2 8% 22% 30% 15%	2730
December	1st to 10th	Night	17% 2 7% 38% 27% 9%	4467
	11th to 20th	Night	20% 3 5% 29% 34% 9%	5322
	21st to end	Night	30% 3 7% 25% 29% 7%	7128

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	7% 2 24% 43% 20% 4	330
	11th to 20th	Day	10% 5% 26% 39% 18% 2	330
	21st to end	Day	6% 4 26% 38% 23% 4	363
February	1st to 10th	Day	4 8% 33% 39% 15% 2	330
	11th to 20th	Day	5% 3 35% 41% 15%	330
	21st to end	Day	6% 5% 31% 43% 13% 2	273
March	1st to 10th	Day	5% 8% 25% 41% 18% 3	330
	11th to 20th	Day	10% 9% 27% 30% 19% 5%	361
	21st to end	Day	12% 13% 30% 28% 15% 2	594
April	1st to 10th	Day	8% 12% 31% 29% 15% 4	540
	11th to 20th	Day	10% 15% 31% 31% 10% 3	532
	21st to end	Day	11% 14% 33% 28% 12% 3	540
May	1st to 10th	Day	11% 11% 28% 30% 17% 4	705
	11th to 20th	Day	11% 7% 25% 32% 21% 5%	725
	21st to end	Day	8% 10% 26% 30% 20% 5%	789
June	1st to 10th	Day	4 5% 22% 31% 28% 11%	730
	11th to 20th	Day	5% 5% 26% 33% 25% 7%	730
	21st to end	Day	5% 4 21% 32% 30% 8%	730
July	1st to 10th	Day	5% 2 14% 34% 32% 12%	721
	11th to 20th	Day	3 1 9% 31% 39% 16%	718
	21st to end	Day	5% 1 8% 28% 39% 18%	794
August	1st to 10th	Day	3 2 13% 32% 36% 15%	558
	11th to 20th	Day	4 2 14% 33% 32% 14%	517
	21st to end	Day	3 2 13% 36% 31% 16%	583
September	1st to 10th	Day	5% 1 16% 33% 28% 16%	530
	11th to 20th	Day	3 2 14% 30% 35% 16%	409
	21st to end	Day	7% 3 17% 24% 30% 19%	330
October	1st to 10th	Day	9% 6% 18% 24% 27% 17%	330
	11th to 20th	Day	4 5% 24% 33% 22% 12%	330
	21st to end	Day	10% 6% 22% 27% 26% 9%	363
November	1st to 10th	Day	8% 3 23% 35% 23% 7%	330
	11th to 20th	Day	7% 5% 18% 38% 27% 5%	330
	21st to end	Day	11% 8% 20% 34% 23% 5%	330
December	1st to 10th	Day	4 4 19% 49% 19% 5%	330
	11th to 20th	Day	6% 5% 19% 41% 26% 2	330
	21st to end	Day	8% 7% 28% 42% 13% 2	363
January	1st to 10th	Night	7% 3 30% 48% 11% 1	1050
	11th to 20th	Night	6% 5% 32% 44% 13%	1050
	21st to end	Night	6% 4 29% 50% 10% 1	950
February	1st to 10th	Night	7% 6% 34% 46% 8%	840
	11th to 20th	Night	8% 8% 39% 38% 7%	824
	21st to end	Night	8% 7% 39% 42% 5%	692
March	1st to 10th	Night	8% 7% 39% 39% 7% 1	840
	11th to 20th	Night	10% 9% 35% 37% 9%	817
	21st to end	Night	9% 10% 44% 33% 4	693
April	1st to 10th	Night	9% 10% 47% 30% 4	630
	11th to 20th	Night	12% 11% 44% 31% 3	623
	21st to end	Night	12% 11% 38% 31% 7%	630
May	1st to 10th	Night	10% 12% 36% 33% 9%	603
	11th to 20th	Night	12% 6% 33% 36% 12% 1	591
	21st to end	Night	12% 9% 41% 31% 8%	650
June	1st to 10th	Night	5% 4 36% 41% 12% 1	600
	11th to 20th	Night	6% 4 44% 40% 7%	600
	21st to end	Night	8% 4 33% 43% 12%	600
July	1st to 10th	Night	6% 3 25% 46% 19% 1	585
	11th to 20th	Night	5% 1 18% 50% 26%	582
	21st to end	Night	7% 2 16% 46% 28% 1	657
August	1st to 10th	Night	7% 2 20% 41% 29% 1	597
	11th to 20th	Night	6% 2 23% 52% 17% 1	594
	21st to end	Night	6% 2 20% 48% 22% 2	660
September	1st to 10th	Night	4 3 25% 50% 18%	600
	11th to 20th	Night	6% 2 28% 48% 17% 1	600
	21st to end	Night	6% 5% 27% 43% 18% 1	600
October	1st to 10th	Night	9% 7% 28% 40% 16% 1	605
	11th to 20th	Night	5% 4 31% 42% 17% 2	800
	21st to end	Night	8% 6% 28% 39% 18% 1	1010
November	1st to 10th	Night	5% 4 27% 48% 15% 1	1025
	11th to 20th	Night	6% 6% 27% 47% 14% 1	1050
	21st to end	Night	8% 7% 25% 43% 16% 1	1050
December	1st to 10th	Night	6% 4 29% 47% 13% 1	1050
	11th to 20th	Night	7% 4 29% 45% 14%	1050
	21st to end	Night	9% 6% 33% 44% 9%	1155

Page generated at 2026-04-29 00:21:47. Version ac07

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