Albuquerque
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Albuquerque clear sky chart from 2005-11-06 to 2024-11-03.

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	3 3 1 3 3 3 4 4 6% 8% 62%	100780
	Night	4 4 2 4 3 4 4 4 5% 7% 58%	98410
Transparency	Day	19% 5% 8% 22% 28% 18%	100543
	Night	24% 6% 8% 20% 26% 16%	98236
Seeing	Day	5% 8% 22% 32% 25% 8%	14965
	Night	6% 5% 25% 43% 20% 1	25127

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	3 8% 3 4 2 3 3 4 5% 7% 60%	2858
	11th to 20th	Day	3 4 1 2 2 2 3 4 5% 6% 68%	2860
	21st to end	Day	5% 7% 2 6% 4 4 4 3 5% 7% 53%	3146
February	1st to 10th	Day	4 7% 2 4 3 3 3 3 5% 6% 61%	1710
	11th to 20th	Day	4 5% 2 4 3 3 3 2 6% 6% 61%	1844
	21st to end	Day	3 6% 1 4 2 3 3 3 4 6% 64%	1570
March	1st to 10th	Day	2 3 2 3 3 3 4 3 5% 6% 66%	3379
	11th to 20th	Day	6% 7% 3 6% 4 4 4 4 5% 8% 51%	3490
	21st to end	Day	3 5% 1 5% 3 3 4 3 5% 7% 60%	3903
April	1st to 10th	Day	3 3 1 3 3 2 3 3 5% 7% 67%	2280
	11th to 20th	Day	3 4 1 4 2 3 3 3 4 6% 66%	2251
	21st to end	Day	3 3 1 3 2 3 4 3 4 6% 68%	2280
May	1st to 10th	Day	2 1 1 2 2 2 3 3 4 7% 74%	3800
	11th to 20th	Day	3 3 1 4 3 3 4 3 6% 9% 59%	3915
	21st to end	Day	2 1 2 1 2 2 2 4 5% 78%	4717
June	1st to 10th	Day	2 2 1 3 3 3 3 4 6% 9% 64%	2660
	11th to 20th	Day	2 1 2 2 2 2 3 5% 6% 73%	2660
	21st to end	Day	4 3 1 4 3 3 4 4 6% 8% 59%	2660
July	1st to 10th	Day	2 2 1 3 3 4 5% 4 7% 8% 61%	4157
	11th to 20th	Day	1 2 1 3 3 4 5% 5% 9% 12% 57%	4110
	21st to end	Day	3 3 1 4 4 5% 7% 7% 10% 12% 46%	4454
August	1st to 10th	Day	2 2 1 4 3 4 6% 5% 8% 13% 52%	4031
	11th to 20th	Day	2 2 1 3 3 3 4 4 7% 11% 62%	3726
	21st to end	Day	3 3 1 4 4 5% 6% 5% 9% 11% 49%	4180
September	1st to 10th	Day	5% 4 1 4 4 3 4 5% 7% 7% 57%	2280
	11th to 20th	Day	4 2 1 4 2 3 5% 4 6% 7% 62%	2280
	21st to end	Day	3 2 2 3 2 2 3 3 4 6% 72%	2041
October	1st to 10th	Day	5% 3 1 4 3 3 3 3 5% 7% 64%	1900
	11th to 20th	Day	3 2 1 3 1 2 2 3 3 4 76%	1900
	21st to end	Day	4 3 1 2 2 2 2 2 2 4 76%	2090
November	1st to 10th	Day	2 2 2 2 2 2 3 4 6% 74%	1879
	11th to 20th	Day	2 2 1 2 2 3 3 2 5% 6% 72%	1726
	21st to end	Day	4 5% 2 3 3 3 3 3 3 5% 67%	1710
December	1st to 10th	Day	4 4 1 3 3 3 3 2 3 6% 66%	1535
	11th to 20th	Day	4 4 2 5% 3 3 5% 4 6% 8% 56%	1926
	21st to end	Day	5% 5% 2 4 2 3 3 2 4 7% 64%	2872
January	1st to 10th	Night	3 10% 2 5% 3 3 4 3 4 6% 57%	4097
	11th to 20th	Night	5% 4 1 3 2 2 3 3 4 5% 70%	4110
	21st to end	Night	7% 7% 2 5% 3 3 4 3 5% 8% 51%	4521
February	1st to 10th	Night	3 6% 1 4 2 2 3 2 4 7% 66%	2470
	11th to 20th	Night	6% 6% 1 4 3 3 3 3 5% 5% 59%	2222
	21st to end	Night	4 5% 2 4 3 2 3 3 4 5% 66%	1884
March	1st to 10th	Night	4 5% 1 4 3 3 3 3 3 5% 66%	3488
	11th to 20th	Night	13% 7% 3 6% 4 4 3 3 4 6% 48%	3490
	21st to end	Night	4 4 1 4 3 3 3 4 5% 7% 62%	3745
April	1st to 10th	Night	4 3 2 4 2 3 3 3 5% 7% 65%	1900
	11th to 20th	Night	4 5% 1 5% 4 3 3 3 4 5% 63%	1877
	21st to end	Night	5% 3 1 3 3 2 3 3 5% 6% 65%	1900
May	1st to 10th	Night	4 3 1 4 3 3 3 4 5% 6% 65%	3170
	11th to 20th	Night	6% 5% 2 4 5% 4 4 4 6% 7% 52%	2973
	21st to end	Night	3 2 1 3 3 2 3 2 4 4 71%	2866
June	1st to 10th	Night	2 2 1 3 2 4 5% 4 8% 11% 57%	1520
	11th to 20th	Night	2 3 1 4 2 2 3 3 5% 7% 67%	1520
	21st to end	Night	4 4 2 5% 4 5% 6% 4 8% 9% 49%	1520
July	1st to 10th	Night	2 3 2 5% 4 4 5% 4 7% 7% 57%	2793
	11th to 20th	Night	3 3 2 6% 5% 6% 6% 6% 11% 13% 41%	2860
	21st to end	Night	5% 4 3 7% 6% 7% 7% 6% 10% 12% 34%	3109
August	1st to 10th	Night	2 3 2 9% 7% 7% 7% 7% 11% 13% 33%	2907
	11th to 20th	Night	3 4 2 5% 5% 6% 6% 5% 9% 11% 43%	3113
	21st to end	Night	4 3 2 6% 7% 7% 8% 7% 10% 12% 34%	3487
September	1st to 10th	Night	4 4 1 5% 4 5% 6% 5% 6% 9% 51%	1900
	11th to 20th	Night	5% 4 1 4 3 4 5% 4 5% 7% 59%	1900
	21st to end	Night	4 3 2 3 2 3 3 2 4 7% 67%	2133
October	1st to 10th	Night	6% 4 2 3 4 3 4 2 5% 6% 62%	2280
	11th to 20th	Night	3 2 1 3 2 3 3 2 3 4 74%	2280
	21st to end	Night	4 3 1 3 2 2 2 2 3 5% 73%	2508
November	1st to 10th	Night	2 2 1 3 2 2 2 2 3 4 77%	2244
	11th to 20th	Night	2 2 1 3 1 2 2 3 4 5% 75%	2432
	21st to end	Night	6% 5% 2 3 3 2 3 3 3 5% 65%	2470
December	1st to 10th	Night	5% 3 1 3 2 2 3 2 4 7% 67%	2641
	11th to 20th	Night	5% 4 2 4 3 4 4 4 6% 8% 58%	3271
	21st to end	Night	6% 6% 2 5% 3 3 3 2 3 5% 63%	4809

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	24% 7% 6% 34% 25% 4	2859
	11th to 20th	Day	16% 6% 12% 38% 24% 4	2860
	21st to end	Day	31% 6% 6% 25% 25% 6%	3146
February	1st to 10th	Day	22% 5% 7% 27% 27% 12%	1710
	11th to 20th	Day	23% 4 6% 25% 30% 12%	1854
	21st to end	Day	22% 4 3 19% 32% 20%	1570
March	1st to 10th	Day	17% 5% 3 19% 36% 19%	3379
	11th to 20th	Day	26% 6% 9% 23% 26% 10%	3490
	21st to end	Day	21% 7% 3 20% 36% 13%	3903
April	1st to 10th	Day	17% 4 4 16% 37% 21%	2280
	11th to 20th	Day	19% 5% 4 16% 31% 26%	2254
	21st to end	Day	16% 5% 4 20% 36% 21%	2280
May	1st to 10th	Day	10% 4 4 16% 37% 30%	3800
	11th to 20th	Day	18% 7% 6% 21% 32% 17%	3918
	21st to end	Day	8% 3 4 11% 22% 52%	4717
June	1st to 10th	Day	15% 5% 7% 20% 26% 27%	2660
	11th to 20th	Day	13% 4 4 11% 23% 46%	2660
	21st to end	Day	21% 6% 7% 19% 23% 24%	2660
July	1st to 10th	Day	18% 7% 9% 15% 21% 30%	4093
	11th to 20th	Day	16% 6% 16% 33% 22% 6%	4041
	21st to end	Day	24% 9% 17% 33% 16% 2	4314
August	1st to 10th	Day	19% 8% 20% 27% 18% 8%	4017
	11th to 20th	Day	15% 6% 11% 25% 28% 16%	3762
	21st to end	Day	26% 9% 16% 24% 20% 5%	4179
September	1st to 10th	Day	24% 7% 9% 20% 27% 13%	2280
	11th to 20th	Day	20% 5% 10% 17% 27% 21%	2280
	21st to end	Day	14% 4 5% 22% 32% 22%	2041
October	1st to 10th	Day	20% 5% 7% 20% 25% 23%	1900
	11th to 20th	Day	14% 2 4 13% 37% 30%	1900
	21st to end	Day	14% 3 5% 22% 38% 18%	2090
November	1st to 10th	Day	12% 4 4 23% 40% 18%	1879
	11th to 20th	Day	15% 4 5% 24% 39% 12%	1726
	21st to end	Day	22% 3 4 23% 34% 14%	1710
December	1st to 10th	Day	22% 3 7% 34% 24% 10%	1535
	11th to 20th	Day	26% 6% 10% 26% 26% 7%	1924
	21st to end	Day	22% 4 7% 23% 30% 14%	2872
January	1st to 10th	Night	28% 7% 7% 28% 24% 6%	4097
	11th to 20th	Night	19% 5% 6% 37% 27% 6%	4110
	21st to end	Night	31% 5% 8% 23% 27% 5%	4521
February	1st to 10th	Night	21% 4 8% 23% 31% 13%	2470
	11th to 20th	Night	26% 4 5% 23% 27% 14%	2222
	21st to end	Night	22% 4 2 18% 33% 21%	1884
March	1st to 10th	Night	20% 6% 2 16% 38% 18%	3488
	11th to 20th	Night	33% 6% 8% 19% 23% 11%	3490
	21st to end	Night	19% 8% 4 23% 32% 13%	3745
April	1st to 10th	Night	18% 4 3 17% 34% 23%	1900
	11th to 20th	Night	22% 4 4 14% 27% 29%	1877
	21st to end	Night	20% 5% 6% 16% 34% 20%	1900
May	1st to 10th	Night	16% 7% 4 13% 33% 28%	3170
	11th to 20th	Night	25% 8% 10% 18% 23% 16%	2974
	21st to end	Night	11% 5% 5% 9% 20% 50%	2866
June	1st to 10th	Night	20% 6% 11% 17% 20% 26%	1520
	11th to 20th	Night	15% 4 5% 12% 21% 43%	1520
	21st to end	Night	27% 7% 11% 13% 16% 26%	1520
July	1st to 10th	Night	25% 7% 11% 15% 14% 28%	2748
	11th to 20th	Night	27% 7% 17% 29% 15% 4	2806
	21st to end	Night	35% 10% 17% 28% 9% 1	3011
August	1st to 10th	Night	34% 10% 17% 20% 12% 7%	2898
	11th to 20th	Night	29% 8% 15% 17% 17% 15%	3143
	21st to end	Night	37% 10% 16% 20% 12% 5%	3487
September	1st to 10th	Night	27% 6% 14% 19% 21% 13%	1900
	11th to 20th	Night	24% 5% 11% 17% 21% 23%	1900
	21st to end	Night	18% 3 5% 17% 31% 25%	2133
October	1st to 10th	Night	23% 4 8% 17% 23% 25%	2280
	11th to 20th	Night	15% 3 4 13% 32% 34%	2280
	21st to end	Night	17% 2 4 18% 39% 20%	2508
November	1st to 10th	Night	12% 2 3 22% 41% 20%	2244
	11th to 20th	Night	14% 3 4 21% 40% 17%	2432
	21st to end	Night	24% 3 4 19% 33% 17%	2470
December	1st to 10th	Night	20% 3 8% 29% 31% 10%	2641
	11th to 20th	Night	24% 5% 8% 26% 28% 9%	3272
	21st to end	Night	25% 4 6% 22% 32% 11%	4809

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% 5% 29% 42% 16% 1	270
	11th to 20th	Day	7% 11% 28% 34% 18% 1	270
	21st to end	Day	2 8% 33% 35% 18% 3	297
February	1st to 10th	Day	4 11% 35% 32% 17% 1	270
	11th to 20th	Day	9% 10% 30% 44% 6%	270
	21st to end	Day	7% 18% 40% 26% 8%	225
March	1st to 10th	Day	4 19% 32% 31% 12% 1	417
	11th to 20th	Day	11% 17% 29% 29% 13% 1	460
	21st to end	Day	10% 23% 35% 21% 10% 1	506
April	1st to 10th	Day	6% 21% 34% 25% 11% 3	460
	11th to 20th	Day	8% 20% 37% 25% 9% 1	452
	21st to end	Day	6% 18% 35% 30% 9% 2	460
May	1st to 10th	Day	5% 15% 35% 31% 12% 2	463
	11th to 20th	Day	3 11% 30% 31% 18% 6%	488
	21st to end	Day	3 11% 26% 38% 19% 2	665
June	1st to 10th	Day	2 4 18% 37% 34% 6%	680
	11th to 20th	Day	3 5% 17% 39% 31% 5%	680
	21st to end	Day	4 3 15% 37% 35% 6%	680
July	1st to 10th	Day	3 1 10% 34% 38% 14%	520
	11th to 20th	Day	2 1 5% 22% 42% 28%	484
	21st to end	Day	2 1 5% 23% 40% 30%	531
August	1st to 10th	Day	3 1 5% 27% 43% 20%	487
	11th to 20th	Day	4 1 7% 29% 41% 19%	477
	21st to end	Day	4 1 8% 29% 41% 17%	539
September	1st to 10th	Day	5% 2 10% 29% 40% 14%	490
	11th to 20th	Day	3 2 17% 37% 32% 9%	490
	21st to end	Day	3 7% 17% 28% 35% 11%	351
October	1st to 10th	Day	4 5% 19% 30% 32% 10%	300
	11th to 20th	Day	7% 8% 15% 31% 33% 6%	300
	21st to end	Day	9% 6% 16% 34% 29% 6%	330
November	1st to 10th	Day	4 9% 24% 40% 22% 2	276
	11th to 20th	Day	3 6% 17% 44% 25% 5%	270
	21st to end	Day	9% 10% 29% 34% 16% 3	270
December	1st to 10th	Day	9% 5% 30% 38% 17% 2	270
	11th to 20th	Day	5% 9% 28% 40% 17% 1	270
	21st to end	Day	12% 10% 32% 34% 11% 1	297
January	1st to 10th	Night	6% 3 29% 45% 16% 1	760
	11th to 20th	Night	7% 5% 30% 43% 14% 1	760
	21st to end	Night	7% 5% 30% 41% 15% 1	836
February	1st to 10th	Night	6% 7% 32% 42% 12% 1	760
	11th to 20th	Night	8% 7% 37% 41% 7%	744
	21st to end	Night	6% 9% 43% 39% 3	628
March	1st to 10th	Night	7% 8% 36% 40% 10%	760
	11th to 20th	Night	8% 10% 30% 39% 13%	760
	21st to end	Night	8% 11% 31% 40% 9%	791
April	1st to 10th	Night	5% 11% 41% 37% 7% 1	570
	11th to 20th	Night	5% 14% 38% 36% 7%	563
	21st to end	Night	6% 10% 38% 39% 6% 1	570
May	1st to 10th	Night	4 7% 36% 44% 8%	570
	11th to 20th	Night	6% 6% 29% 41% 16% 1	561
	21st to end	Night	4 6% 34% 44% 12%	617
June	1st to 10th	Night	2 4 22% 53% 18% 1	570
	11th to 20th	Night	2 4 25% 49% 19%	570
	21st to end	Night	5% 3 17% 46% 28%	570
July	1st to 10th	Night	3 1 12% 46% 36% 3	555
	11th to 20th	Night	3 1 8% 34% 52% 3	552
	21st to end	Night	3 2 7% 32% 50% 6%	624
August	1st to 10th	Night	4 1 6% 32% 52% 6%	567
	11th to 20th	Night	6% 1 8% 40% 41% 4	564
	21st to end	Night	3 1 7% 38% 47% 4	627
September	1st to 10th	Night	5% 1 8% 51% 34% 2	570
	11th to 20th	Night	6% 2 12% 46% 31% 2	570
	21st to end	Night	5% 2 16% 45% 30% 2	665
October	1st to 10th	Night	6% 4 21% 47% 22% 2	760
	11th to 20th	Night	4 5% 20% 50% 19% 2	760
	21st to end	Night	5% 5% 24% 41% 23% 3	836
November	1st to 10th	Night	3 2 22% 51% 20% 1	748
	11th to 20th	Night	3 3 23% 49% 19% 2	912
	21st to end	Night	9% 7% 24% 37% 21% 1	950
December	1st to 10th	Night	7% 5% 28% 45% 15% 1	950
	11th to 20th	Night	8% 5% 28% 46% 13% 1	950
	21st to end	Night	8% 7% 30% 45% 9% 1	1007

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