Aguila Vista Lodge
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Aguila Vista Lodge clear sky chart from 2005-11-06 to 2024-09-14.

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	8% 5% 2 5% 4 4 4 3 5% 7% 53%	100410
	Night	8% 5% 2 4 3 3 3 3 5% 7% 58%	97590
Transparency	Day	30% 6% 10% 22% 21% 11%	100221
	Night	26% 6% 12% 22% 21% 13%	97450
Seeing	Day	10% 8% 25% 33% 20% 5%	14691
	Night	10% 7% 32% 37% 12% 1	24597

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	9% 7% 2 5% 3 3 3 2 3 6% 59%	2847
	11th to 20th	Day	8% 8% 2 4 2 3 3 3 5% 5% 59%	2918
	21st to end	Day	11% 7% 2 5% 3 3 3 3 4 7% 51%	3487
February	1st to 10th	Day	10% 7% 2 5% 3 3 3 3 5% 5% 53%	1900
	11th to 20th	Day	11% 6% 2 4 5% 3 4 3 4 5% 52%	1849
	21st to end	Day	11% 5% 2 4 3 3 4 3 5% 6% 55%	1570
March	1st to 10th	Day	11% 7% 2 7% 4 4 4 3 5% 6% 49%	3223
	11th to 20th	Day	15% 8% 3 8% 5% 3 4 3 5% 6% 40%	3480
	21st to end	Day	7% 6% 2 5% 4 4 4 4 5% 7% 52%	3814
April	1st to 10th	Day	9% 5% 2 5% 4 3 3 3 5% 8% 53%	2092
	11th to 20th	Day	11% 6% 2 6% 4 4 3 3 4 7% 50%	2254
	21st to end	Day	9% 6% 2 5% 4 4 3 3 3 6% 55%	2314
May	1st to 10th	Day	12% 7% 2 6% 5% 4 4 4 6% 7% 43%	4082
	11th to 20th	Day	12% 6% 3 6% 4 3 3 4 5% 5% 49%	4082
	21st to end	Day	7% 5% 2 6% 4 4 4 5% 7% 9% 46%	4477
June	1st to 10th	Day	4 3 1 4 4 4 5% 3 6% 8% 57%	2470
	11th to 20th	Day	3 3 2 3 4 4 5% 5% 6% 9% 56%	2470
	21st to end	Day	6% 3 1 5% 5% 4 6% 5% 8% 9% 48%	2470
July	1st to 10th	Day	4 3 1 5% 4 5% 5% 5% 6% 8% 53%	4120
	11th to 20th	Day	2 2 1 4 3 4 4 4 6% 9% 60%	4120
	21st to end	Day	6% 4 2 5% 4 5% 5% 5% 6% 9% 48%	4465
August	1st to 10th	Day	1 1 1 3 3 3 3 3 5% 8% 70%	3799
	11th to 20th	Day	3 3 1 3 3 3 4 3 5% 8% 64%	3726
	21st to end	Day	4 4 1 5% 5% 5% 6% 5% 6% 10% 48%	4180
September	1st to 10th	Day	10% 5% 2 6% 4 5% 5% 3 5% 7% 48%	2094
	11th to 20th	Day	9% 6% 2 6% 4 4 6% 3 5% 7% 47%	2013
	21st to end	Day	9% 3 2 5% 4 3 4 4 6% 7% 53%	1980
October	1st to 10th	Day	5% 4 2 5% 3 3 4 3 6% 7% 58%	1980
	11th to 20th	Day	11% 5% 2 4 4 3 3 2 4 6% 57%	1957
	21st to end	Day	10% 4 2 4 3 2 2 2 4 5% 62%	1980
November	1st to 10th	Day	11% 6% 2 5% 2 2 3 3 5% 7% 55%	1771
	11th to 20th	Day	7% 5% 2 4 3 4 3 3 5% 6% 59%	1710
	21st to end	Day	11% 7% 2 5% 3 3 2 2 4 6% 53%	1710
December	1st to 10th	Day	12% 6% 2 4 4 3 3 3 4 7% 53%	1710
	11th to 20th	Day	11% 6% 2 5% 3 4 4 3 4 5% 51%	2161
	21st to end	Day	10% 6% 2 4 3 3 2 2 4 4 61%	3135
January	1st to 10th	Night	11% 6% 3 4 2 3 3 2 3 6% 58%	4108
	11th to 20th	Night	8% 5% 1 3 1 2 2 2 3 4 68%	4082
	21st to end	Night	14% 6% 2 5% 3 3 3 2 4 7% 50%	4180
February	1st to 10th	Night	9% 7% 2 5% 3 3 3 3 4 6% 55%	2280
	11th to 20th	Night	13% 6% 2 4 3 3 2 2 4 6% 55%	2218
	21st to end	Night	9% 6% 2 4 3 3 4 3 5% 7% 53%	1884
March	1st to 10th	Night	7% 5% 2 5% 3 3 4 4 6% 8% 53%	3623
	11th to 20th	Night	14% 7% 2 6% 4 3 4 5% 5% 5% 43%	3480
	21st to end	Night	7% 7% 2 5% 4 4 3 4 5% 7% 54%	3817
April	1st to 10th	Night	6% 5% 1 4 3 4 5% 4 6% 7% 56%	2082
	11th to 20th	Night	9% 6% 2 5% 4 4 3 3 5% 6% 53%	1877
	21st to end	Night	9% 4 2 4 3 3 3 2 4 6% 60%	1862
May	1st to 10th	Night	12% 6% 2 5% 3 3 3 3 5% 8% 49%	2823
	11th to 20th	Night	7% 5% 2 5% 4 3 3 3 5% 8% 54%	2823
	21st to end	Night	7% 4 2 5% 4 4 4 4 6% 9% 52%	3090
June	1st to 10th	Night	2 2 1 3 3 2 4 4 7% 11% 62%	1710
	11th to 20th	Night	2 1 1 2 2 3 3 4 7% 9% 66%	1710
	21st to end	Night	3 3 1 3 5% 3 3 4 6% 9% 60%	1710
July	1st to 10th	Night	3 3 1 4 3 3 4 4 6% 9% 60%	2850
	11th to 20th	Night	2 2 1 2 2 2 3 3 5% 9% 70%	2850
	21st to end	Night	3 3 1 4 3 3 4 4 8% 10% 57%	3098
August	1st to 10th	Night	1 1 2 2 2 2 2 4 6% 76%	3123
	11th to 20th	Night	2 2 1 2 3 2 4 3 6% 10% 64%	3113
	21st to end	Night	4 3 1 4 3 3 4 4 7% 11% 55%	3487
September	1st to 10th	Night	7% 4 2 5% 3 4 4 3 7% 7% 55%	2085
	11th to 20th	Night	8% 4 2 5% 4 4 4 4 6% 8% 51%	2024
	21st to end	Night	7% 4 2 4 4 3 4 3 6% 7% 56%	1980
October	1st to 10th	Night	5% 3 1 2 3 2 2 3 4 8% 66%	1980
	11th to 20th	Night	10% 4 1 4 3 3 3 3 4 5% 60%	1984
	21st to end	Night	10% 5% 1 4 2 2 3 2 3 4 63%	2376
November	1st to 10th	Night	9% 4 1 4 3 3 2 2 4 5% 61%	2303
	11th to 20th	Night	7% 4 1 4 3 3 4 3 5% 6% 61%	2470
	21st to end	Night	11% 5% 2 5% 4 3 3 3 5% 6% 53%	2470
December	1st to 10th	Night	10% 5% 1 4 3 2 4 3 5% 6% 57%	2470
	11th to 20th	Night	10% 7% 3 5% 4 4 3 3 5% 6% 51%	3036
	21st to end	Night	10% 5% 2 4 3 2 2 2 4 6% 59%	4532

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	28% 5% 4 15% 23% 24%	2848
	11th to 20th	Day	27% 4 6% 14% 32% 18%	2918
	21st to end	Day	33% 5% 7% 14% 29% 12%	3487
February	1st to 10th	Day	32% 5% 8% 14% 22% 20%	1900
	11th to 20th	Day	34% 4 7% 18% 20% 17%	1859
	21st to end	Day	30% 4 7% 14% 25% 20%	1570
March	1st to 10th	Day	36% 5% 7% 13% 20% 20%	3223
	11th to 20th	Day	44% 8% 8% 12% 17% 12%	3480
	21st to end	Day	30% 6% 9% 15% 20% 19%	3814
April	1st to 10th	Day	31% 5% 9% 18% 20% 16%	2092
	11th to 20th	Day	34% 6% 7% 16% 22% 15%	2254
	21st to end	Day	33% 5% 7% 20% 22% 13%	2314
May	1st to 10th	Day	39% 8% 11% 14% 19% 10%	4120
	11th to 20th	Day	36% 7% 8% 16% 22% 10%	4086
	21st to end	Day	31% 10% 13% 25% 15% 6%	4489
June	1st to 10th	Day	23% 7% 14% 30% 22% 4	2470
	11th to 20th	Day	23% 7% 14% 26% 23% 7%	2470
	21st to end	Day	28% 11% 13% 23% 19% 6%	2470
July	1st to 10th	Day	26% 9% 17% 38% 9% 1	4056
	11th to 20th	Day	20% 6% 15% 35% 20% 3	4051
	21st to end	Day	28% 8% 17% 30% 16% 1	4325
August	1st to 10th	Day	14% 5% 11% 38% 31% 1	3785
	11th to 20th	Day	20% 5% 18% 41% 14% 2	3762
	21st to end	Day	29% 10% 16% 24% 19% 2	4179
September	1st to 10th	Day	35% 8% 11% 19% 17% 9%	2094
	11th to 20th	Day	38% 8% 11% 18% 18% 6%	2013
	21st to end	Day	30% 7% 12% 22% 20% 11%	1980
October	1st to 10th	Day	24% 8% 11% 22% 25% 10%	1980
	11th to 20th	Day	30% 5% 8% 15% 24% 18%	1957
	21st to end	Day	27% 5% 5% 17% 28% 20%	1980
November	1st to 10th	Day	30% 5% 10% 21% 22% 12%	1771
	11th to 20th	Day	27% 7% 8% 18% 23% 18%	1710
	21st to end	Day	34% 4 5% 17% 24% 15%	1710
December	1st to 10th	Day	32% 4 8% 19% 26% 11%	1710
	11th to 20th	Day	34% 5% 8% 12% 23% 18%	2159
	21st to end	Day	29% 4 5% 16% 28% 20%	3135
January	1st to 10th	Night	29% 4 4 13% 28% 22%	4108
	11th to 20th	Night	22% 3 5% 17% 26% 27%	4082
	21st to end	Night	35% 4 6% 12% 29% 14%	4180
February	1st to 10th	Night	31% 5% 8% 14% 23% 20%	2280
	11th to 20th	Night	31% 5% 6% 17% 22% 19%	2218
	21st to end	Night	30% 5% 7% 14% 23% 21%	1884
March	1st to 10th	Night	27% 8% 10% 15% 24% 15%	3623
	11th to 20th	Night	40% 7% 9% 14% 16% 13%	3480
	21st to end	Night	30% 7% 10% 18% 17% 18%	3817
April	1st to 10th	Night	27% 6% 10% 21% 17% 19%	2082
	11th to 20th	Night	31% 7% 11% 15% 19% 17%	1877
	21st to end	Night	27% 6% 10% 22% 22% 12%	1862
May	1st to 10th	Night	34% 8% 12% 19% 16% 12%	2850
	11th to 20th	Night	27% 9% 12% 22% 18% 11%	2824
	21st to end	Night	27% 10% 15% 28% 13% 8%	3099
June	1st to 10th	Night	14% 8% 18% 34% 23% 3	1710
	11th to 20th	Night	15% 7% 18% 29% 24% 7%	1710
	21st to end	Night	22% 8% 16% 29% 20% 5%	1710
July	1st to 10th	Night	20% 9% 22% 39% 9% 1	2805
	11th to 20th	Night	13% 6% 18% 39% 21% 3	2796
	21st to end	Night	20% 9% 20% 36% 14% 1	2999
August	1st to 10th	Night	11% 5% 13% 39% 31% 1	3113
	11th to 20th	Night	16% 6% 24% 40% 13% 2	3143
	21st to end	Night	22% 10% 22% 25% 19% 2	3487
September	1st to 10th	Night	27% 8% 13% 24% 19% 9%	2085
	11th to 20th	Night	29% 10% 17% 21% 17% 7%	2024
	21st to end	Night	27% 6% 13% 21% 20% 12%	1980
October	1st to 10th	Night	17% 7% 14% 27% 22% 12%	1980
	11th to 20th	Night	26% 5% 10% 17% 24% 18%	1984
	21st to end	Night	27% 4 7% 16% 23% 23%	2376
November	1st to 10th	Night	25% 6% 9% 19% 26% 15%	2303
	11th to 20th	Night	23% 5% 10% 21% 22% 18%	2470
	21st to end	Night	33% 5% 8% 15% 23% 16%	2470
December	1st to 10th	Night	29% 5% 10% 19% 24% 14%	2470
	11th to 20th	Night	34% 6% 6% 14% 20% 20%	3037
	21st to end	Night	28% 4 5% 15% 29% 19%	4532

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	13% 14% 43% 23% 6% 1	270
	11th to 20th	Day	17% 14% 31% 28% 8% 1	270
	21st to end	Day	11% 14% 43% 23% 8%	297
February	1st to 10th	Day	19% 17% 36% 20% 8% 1	270
	11th to 20th	Day	18% 17% 39% 24% 3	270
	21st to end	Day	16% 14% 50% 18% 2	225
March	1st to 10th	Day	14% 19% 40% 24% 3	270
	11th to 20th	Day	16% 16% 41% 20% 7%	270
	21st to end	Day	14% 18% 48% 13% 5% 1	297
April	1st to 10th	Day	14% 20% 40% 24% 1	272
	11th to 20th	Day	13% 21% 41% 21% 3	452
	21st to end	Day	10% 19% 41% 25% 4	494
May	1st to 10th	Day	11% 11% 44% 29% 5%	653
	11th to 20th	Day	16% 8% 36% 30% 9% 2	675
	21st to end	Day	10% 8% 33% 38% 11% 1	734
June	1st to 10th	Day	4 3 21% 48% 21% 3	680
	11th to 20th	Day	3 1 26% 50% 18% 3	680
	21st to end	Day	3 1 17% 45% 29% 5%	680
July	1st to 10th	Day	6% 2 10% 37% 36% 8%	671
	11th to 20th	Day	2 6% 45% 40% 7%	668
	21st to end	Day	4 1 4 41% 39% 11%	739
August	1st to 10th	Day	2 4 37% 44% 13%	501
	11th to 20th	Day	5% 1 6% 35% 39% 13%	477
	21st to end	Day	6% 1 5% 32% 40% 17%	539
September	1st to 10th	Day	12% 1 5% 26% 38% 18%	304
	11th to 20th	Day	7% 7% 25% 42% 19%	279
	21st to end	Day	14% 3 3 34% 33% 13%	270
October	1st to 10th	Day	5% 3 13% 34% 39% 6%	270
	11th to 20th	Day	11% 4 24% 38% 19% 3	270
	21st to end	Day	16% 12% 27% 28% 15% 2	297
November	1st to 10th	Day	17% 7% 29% 33% 12% 2	270
	11th to 20th	Day	16% 11% 30% 25% 12% 6%	270
	21st to end	Day	19% 19% 32% 20% 9% 2	270
December	1st to 10th	Day	15% 9% 29% 36% 9% 3	270
	11th to 20th	Day	14% 17% 34% 26% 8% 1	270
	21st to end	Day	13% 13% 38% 27% 8%	297
January	1st to 10th	Night	14% 8% 38% 31% 8%	950
	11th to 20th	Night	14% 10% 37% 33% 7%	925
	21st to end	Night	16% 9% 39% 29% 7%	836
February	1st to 10th	Night	14% 13% 39% 30% 4	760
	11th to 20th	Night	16% 14% 42% 26% 2	744
	21st to end	Night	13% 17% 47% 22% 1	628
March	1st to 10th	Night	13% 15% 45% 24% 3	701
	11th to 20th	Night	13% 9% 46% 28% 4	570
	21st to end	Night	7% 15% 54% 23% 2	627
April	1st to 10th	Night	6% 14% 54% 23% 2	570
	11th to 20th	Night	10% 13% 54% 21% 1	563
	21st to end	Night	10% 11% 53% 21% 5%	570
May	1st to 10th	Night	8% 13% 50% 26% 3	570
	11th to 20th	Night	9% 7% 43% 32% 8%	561
	21st to end	Night	8% 6% 43% 34% 8%	617
June	1st to 10th	Night	2 1 35% 49% 14%	570
	11th to 20th	Night	3 1 39% 49% 8%	570
	21st to end	Night	3 2 22% 52% 20% 1	570
July	1st to 10th	Night	5% 1 11% 57% 23% 2	555
	11th to 20th	Night	2 14% 61% 22% 1	552
	21st to end	Night	2 1 8% 63% 25% 2	624
August	1st to 10th	Night	1 6% 65% 26% 1	567
	11th to 20th	Night	4 1 7% 55% 30% 3	564
	21st to end	Night	4 1 8% 47% 35% 4	627
September	1st to 10th	Night	6% 2 10% 47% 32% 3	570
	11th to 20th	Night	9% 1 9% 46% 34% 1	552
	21st to end	Night	9% 1 12% 48% 28% 1	540
October	1st to 10th	Night	5% 1 17% 52% 24%	540
	11th to 20th	Night	10% 4 26% 44% 15% 1	544
	21st to end	Night	11% 9% 30% 33% 15% 1	792
November	1st to 10th	Night	12% 5% 29% 40% 14% 1	823
	11th to 20th	Night	9% 7% 34% 35% 14% 1	950
	21st to end	Night	13% 10% 34% 31% 10% 1	950
December	1st to 10th	Night	13% 7% 32% 38% 9%	950
	11th to 20th	Night	16% 10% 35% 35% 5%	950
	21st to end	Night	12% 11% 38% 33% 6%	1045

Page generated at 2024-09-11 09:00:03. Version ac07

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