Miquelon Lake Provincial Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Miquelon Lake Provincial Park clear sky chart from 2005-11-06 to 2024-01-12.

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	10% 8% 4 8% 7% 4 6% 5% 6% 8% 34%	74632
	Night	8% 9% 4 8% 7% 4 6% 6% 6% 8% 33%	75088
Transparency	Day	46% 9% 17% 21% 7% 1	74313
	Night	46% 9% 16% 20% 9% 1	74925
Seeing	Day	12% 7% 24% 32% 19% 6%	14312
	Night	12% 6% 28% 36% 16% 2	23504

By Month

Percentage Cloud Cover NW (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	6% 10% 5% 10% 10% 6% 7% 5% 6% 8% 25%	1329
	11th to 20th	Day	5% 11% 5% 10% 10% 5% 5% 5% 5% 9% 30%	1267
	21st to end	Day	5% 13% 6% 12% 9% 5% 8% 5% 5% 7% 24%	1476
February	1st to 10th	Day	8% 11% 6% 10% 9% 5% 5% 5% 6% 9% 26%	1440
	11th to 20th	Day	6% 10% 7% 11% 8% 4 7% 8% 6% 7% 25%	1553
	21st to end	Day	4 11% 7% 10% 9% 3 8% 7% 7% 8% 26%	1360
March	1st to 10th	Day	5% 14% 6% 9% 10% 4 7% 7% 6% 8% 24%	1800
	11th to 20th	Day	8% 12% 5% 9% 6% 4 5% 5% 6% 8% 34%	1979
	21st to end	Day	9% 12% 6% 13% 7% 4 6% 5% 6% 8% 23%	2179
April	1st to 10th	Day	10% 9% 4 8% 7% 5% 5% 6% 6% 9% 30%	2267
	11th to 20th	Day	13% 11% 4 8% 6% 4 5% 5% 6% 8% 30%	2310
	21st to end	Day	13% 9% 4 7% 6% 3 6% 5% 6% 8% 33%	2340
May	1st to 10th	Day	11% 9% 4 7% 7% 4 6% 7% 6% 7% 29%	2612
	11th to 20th	Day	8% 6% 4 7% 6% 4 5% 5% 6% 9% 40%	2654
	21st to end	Day	17% 7% 3 7% 5% 4 5% 5% 5% 7% 33%	2917
June	1st to 10th	Day	15% 8% 4 7% 7% 4 6% 6% 6% 7% 30%	2700
	11th to 20th	Day	19% 9% 5% 7% 7% 4 6% 5% 6% 8% 23%	2700
	21st to end	Day	11% 5% 3 6% 6% 4 6% 7% 7% 9% 36%	2700
July	1st to 10th	Day	10% 6% 3 7% 6% 3 5% 6% 7% 8% 39%	2700
	11th to 20th	Day	10% 6% 3 6% 5% 4 6% 6% 7% 10% 37%	2700
	21st to end	Day	9% 5% 2 5% 5% 3 5% 5% 7% 8% 45%	2938
August	1st to 10th	Day	10% 6% 2 6% 6% 4 5% 6% 7% 10% 39%	2593
	11th to 20th	Day	9% 5% 2 5% 5% 3 5% 5% 6% 10% 44%	2346
	21st to end	Day	9% 6% 3 5% 5% 3 5% 6% 6% 9% 43%	2574
September	1st to 10th	Day	11% 5% 2 7% 6% 3 5% 5% 6% 8% 42%	2291
	11th to 20th	Day	14% 7% 3 6% 5% 3 4 4 6% 8% 41%	1980
	21st to end	Day	9% 6% 3 6% 5% 3 5% 5% 6% 8% 44%	1980
October	1st to 10th	Day	10% 10% 4 7% 6% 4 6% 4 4 7% 38%	1854
	11th to 20th	Day	10% 8% 4 6% 5% 3 4 5% 6% 9% 39%	1676
	21st to end	Day	8% 11% 5% 7% 7% 4 6% 6% 7% 8% 31%	1743
November	1st to 10th	Day	8% 14% 6% 10% 7% 5% 5% 5% 6% 9% 25%	1488
	11th to 20th	Day	5% 10% 5% 14% 9% 5% 5% 4 5% 7% 30%	1402
	21st to end	Day	6% 8% 8% 10% 8% 4 5% 5% 5% 8% 32%	1330
December	1st to 10th	Day	6% 11% 4 9% 10% 4 9% 7% 7% 8% 25%	1330
	11th to 20th	Day	6% 8% 5% 13% 8% 4 8% 5% 8% 9% 26%	1682
	21st to end	Day	4 8% 3 6% 7% 4 6% 4 7% 7% 44%	2442
January	1st to 10th	Night	6% 9% 6% 10% 11% 6% 7% 7% 7% 6% 26%	2836
	11th to 20th	Night	5% 10% 5% 11% 8% 4 7% 6% 6% 8% 29%	2722
	21st to end	Night	6% 12% 6% 12% 8% 5% 6% 5% 6% 7% 26%	2898
February	1st to 10th	Night	5% 9% 5% 12% 10% 6% 8% 6% 6% 7% 27%	2520
	11th to 20th	Night	6% 11% 5% 9% 8% 4 7% 6% 7% 8% 30%	2294
	21st to end	Night	4 10% 4 9% 8% 5% 7% 7% 8% 8% 31%	1893
March	1st to 10th	Night	7% 10% 5% 11% 8% 5% 7% 5% 7% 8% 28%	2160
	11th to 20th	Night	7% 10% 4 9% 10% 4 6% 5% 7% 9% 28%	1980
	21st to end	Night	9% 12% 5% 9% 7% 4 5% 6% 7% 9% 26%	2174
April	1st to 10th	Night	6% 9% 3 8% 8% 5% 5% 6% 8% 7% 35%	1693
	11th to 20th	Night	12% 10% 5% 8% 7% 4 7% 6% 7% 7% 28%	1601
	21st to end	Night	13% 9% 3 6% 6% 3 5% 6% 4 9% 35%	1620
May	1st to 10th	Night	12% 10% 4 8% 7% 5% 5% 6% 6% 7% 30%	1346
	11th to 20th	Night	9% 8% 4 8% 7% 4 6% 5% 5% 8% 37%	1239
	21st to end	Night	19% 7% 3 7% 7% 4 5% 4 5% 7% 32%	1358
June	1st to 10th	Night	14% 8% 4 7% 7% 4 5% 6% 6% 7% 30%	1260
	11th to 20th	Night	16% 9% 5% 8% 7% 5% 7% 6% 8% 7% 23%	1260
	21st to end	Night	8% 5% 3 7% 7% 4 6% 7% 8% 10% 37%	1260
July	1st to 10th	Night	11% 6% 2 6% 7% 3 5% 5% 7% 9% 39%	1260
	11th to 20th	Night	9% 5% 3 5% 6% 3 6% 6% 8% 12% 36%	1260
	21st to end	Night	8% 5% 2 5% 4 3 4 5% 7% 9% 47%	1379
August	1st to 10th	Night	10% 5% 2 5% 5% 3 6% 7% 8% 10% 38%	1344
	11th to 20th	Night	12% 6% 2 4 6% 2 5% 5% 7% 9% 42%	1554
	21st to end	Night	9% 5% 2 5% 7% 4 6% 6% 6% 8% 41%	1782
September	1st to 10th	Night	12% 4 2 6% 5% 2 5% 6% 6% 7% 44%	1667
	11th to 20th	Night	12% 7% 2 5% 4 2 3 4 5% 7% 47%	1980
	21st to end	Night	9% 6% 3 6% 5% 3 4 5% 5% 8% 46%	1980
October	1st to 10th	Night	11% 8% 3 8% 6% 3 5% 5% 5% 8% 39%	2105
	11th to 20th	Night	9% 9% 4 7% 6% 3 5% 5% 6% 9% 38%	2281
	21st to end	Night	7% 10% 3 9% 8% 5% 6% 6% 7% 8% 33%	2594
November	1st to 10th	Night	12% 14% 5% 9% 7% 4 5% 5% 5% 7% 28%	2590
	11th to 20th	Night	6% 12% 6% 10% 9% 5% 6% 6% 6% 7% 28%	2774
	21st to end	Night	5% 9% 6% 11% 9% 4 6% 6% 6% 9% 29%	2850
December	1st to 10th	Night	7% 11% 6% 9% 10% 5% 7% 5% 5% 7% 28%	2850
	11th to 20th	Night	5% 11% 5% 12% 9% 4 6% 6% 7% 9% 26%	3510
	21st to end	Night	3 7% 3 7% 7% 4 7% 6% 6% 9% 43%	5214

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	55% 9% 12% 17% 6% 1	1329
	11th to 20th	Day	51% 8% 15% 16% 9% 1	1267
	21st to end	Day	57% 8% 11% 16% 7%	1476
February	1st to 10th	Day	54% 6% 15% 17% 7% 1	1440
	11th to 20th	Day	54% 8% 15% 15% 7%	1562
	21st to end	Day	51% 8% 13% 21% 7%	1360
March	1st to 10th	Day	55% 9% 15% 16% 4	1800
	11th to 20th	Day	47% 7% 14% 21% 11%	1980
	21st to end	Day	57% 9% 14% 16% 4	2179
April	1st to 10th	Day	48% 9% 18% 17% 8% 1	2267
	11th to 20th	Day	50% 7% 15% 20% 8%	2310
	21st to end	Day	47% 8% 16% 21% 7% 2	2340
May	1st to 10th	Day	49% 10% 16% 18% 7%	2612
	11th to 20th	Day	40% 8% 14% 28% 11% 1	2658
	21st to end	Day	49% 8% 14% 19% 11%	2918
June	1st to 10th	Day	50% 8% 14% 20% 8%	2700
	11th to 20th	Day	57% 9% 16% 13% 5%	2700
	21st to end	Day	40% 12% 23% 20% 5% 1	2700
July	1st to 10th	Day	39% 10% 21% 24% 4 1	2626
	11th to 20th	Day	39% 12% 24% 23% 2	2619
	21st to end	Day	34% 10% 26% 26% 3	2775
August	1st to 10th	Day	38% 12% 24% 23% 3	2575
	11th to 20th	Day	33% 11% 26% 24% 7%	2346
	21st to end	Day	35% 10% 21% 26% 7% 1	2574
September	1st to 10th	Day	38% 10% 19% 24% 7% 2	2291
	11th to 20th	Day	40% 7% 19% 26% 7%	1980
	21st to end	Day	36% 10% 18% 26% 8% 2	1980
October	1st to 10th	Day	47% 6% 17% 21% 9%	1854
	11th to 20th	Day	41% 8% 19% 23% 10%	1676
	21st to end	Day	48% 10% 13% 21% 7%	1743
November	1st to 10th	Day	54% 8% 16% 14% 7% 1	1488
	11th to 20th	Day	54% 6% 15% 19% 5%	1402
	21st to end	Day	50% 8% 18% 19% 6% 1	1330
December	1st to 10th	Day	54% 9% 13% 15% 7% 1	1330
	11th to 20th	Day	50% 10% 17% 18% 6%	1684
	21st to end	Day	38% 7% 11% 28% 15% 2	2442
January	1st to 10th	Night	55% 9% 15% 13% 7% 1	2836
	11th to 20th	Night	50% 8% 16% 16% 7% 1	2722
	21st to end	Night	55% 8% 13% 16% 8% 1	2898
February	1st to 10th	Night	54% 6% 13% 18% 8% 1	2520
	11th to 20th	Night	50% 9% 15% 17% 9%	2295
	21st to end	Night	46% 9% 12% 21% 10% 1	1893
March	1st to 10th	Night	52% 8% 13% 19% 7% 1	2160
	11th to 20th	Night	49% 7% 13% 20% 10% 1	1980
	21st to end	Night	50% 10% 16% 17% 7% 1	2174
April	1st to 10th	Night	44% 8% 14% 21% 12% 1	1693
	11th to 20th	Night	52% 8% 12% 18% 8% 2	1601
	21st to end	Night	45% 8% 13% 21% 11% 2	1620
May	1st to 10th	Night	50% 9% 10% 22% 8% 1	1346
	11th to 20th	Night	44% 8% 12% 22% 13% 1	1239
	21st to end	Night	51% 8% 11% 18% 10% 2	1358
June	1st to 10th	Night	50% 8% 14% 20% 7% 1	1260
	11th to 20th	Night	55% 12% 16% 12% 5%	1260
	21st to end	Night	38% 11% 23% 22% 4 1	1260
July	1st to 10th	Night	39% 10% 20% 24% 6% 1	1225
	11th to 20th	Night	38% 14% 23% 20% 5%	1218
	21st to end	Night	31% 10% 24% 30% 5%	1302
August	1st to 10th	Night	36% 13% 24% 24% 3	1337
	11th to 20th	Night	36% 10% 22% 25% 6% 1	1554
	21st to end	Night	38% 9% 16% 28% 8% 1	1782
September	1st to 10th	Night	34% 10% 19% 24% 10% 2	1667
	11th to 20th	Night	36% 7% 17% 29% 9% 2	1980
	21st to end	Night	35% 9% 15% 25% 13% 3	1980
October	1st to 10th	Night	42% 7% 16% 24% 10% 1	2105
	11th to 20th	Night	42% 8% 16% 25% 8% 1	2281
	21st to end	Night	46% 10% 15% 21% 7% 1	2594
November	1st to 10th	Night	55% 7% 12% 18% 7%	2590
	11th to 20th	Night	53% 9% 13% 17% 6% 1	2774
	21st to end	Night	51% 8% 16% 18% 6% 1	2850
December	1st to 10th	Night	53% 8% 14% 16% 8% 1	2850
	11th to 20th	Night	52% 9% 18% 14% 6%	3507
	21st to end	Night	36% 8% 16% 19% 17% 3	5214

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	11% 5% 29% 31% 19% 5%	180
	11th to 20th	Day	12% 6% 30% 31% 19% 2	162
	21st to end	Day	10% 10% 26% 36% 13% 6%	176
February	1st to 10th	Day	12% 8% 29% 35% 13% 3	160
	11th to 20th	Day	11% 7% 31% 33% 16% 2	230
	21st to end	Day	5% 4 30% 33% 19% 9%	226
March	1st to 10th	Day	10% 7% 27% 34% 19% 3	420
	11th to 20th	Day	10% 5% 29% 32% 18% 6%	420
	21st to end	Day	15% 4 22% 36% 19% 4	462
April	1st to 10th	Day	8% 11% 25% 37% 14% 4	420
	11th to 20th	Day	17% 6% 19% 29% 22% 7%	412
	21st to end	Day	18% 8% 22% 32% 15% 5%	420
May	1st to 10th	Day	12% 8% 23% 34% 16% 6%	579
	11th to 20th	Day	10% 6% 22% 35% 20% 7%	625
	21st to end	Day	17% 4 22% 30% 18% 9%	679
June	1st to 10th	Day	17% 7% 22% 33% 16% 4	630
	11th to 20th	Day	18% 7% 23% 26% 18% 8%	630
	21st to end	Day	11% 5% 20% 29% 24% 11%	630
July	1st to 10th	Day	11% 4 16% 34% 25% 10%	621
	11th to 20th	Day	11% 4 20% 31% 26% 8%	618
	21st to end	Day	9% 4 18% 33% 25% 10%	684
August	1st to 10th	Day	12% 4 21% 30% 22% 12%	533
	11th to 20th	Day	9% 5% 24% 30% 25% 7%	437
	21st to end	Day	12% 6% 19% 31% 23% 10%	495
September	1st to 10th	Day	12% 9% 30% 26% 18% 6%	450
	11th to 20th	Day	17% 6% 27% 31% 16% 3	450
	21st to end	Day	12% 13% 29% 26% 16% 4	450
October	1st to 10th	Day	19% 6% 28% 26% 16% 5%	324
	11th to 20th	Day	14% 8% 29% 31% 15% 3	270
	21st to end	Day	13% 12% 34% 27% 11% 2	297
November	1st to 10th	Day	13% 9% 31% 31% 14% 2	270
	11th to 20th	Day	10% 9% 36% 34% 10% 1	214
	21st to end	Day	5% 7% 37% 36% 11% 5%	180
December	1st to 10th	Day	8% 7% 32% 31% 16% 6%	180
	11th to 20th	Day	7% 12% 28% 35% 17% 1	180
	21st to end	Day	8% 5% 23% 39% 22% 4	198
January	1st to 10th	Night	9% 7% 33% 35% 13% 2	950
	11th to 20th	Night	9% 9% 34% 36% 11% 1	908
	21st to end	Night	12% 11% 33% 32% 10% 2	918
February	1st to 10th	Night	9% 8% 26% 37% 18% 2	720
	11th to 20th	Night	10% 6% 33% 36% 15% 1	704
	21st to end	Night	8% 4 26% 36% 21% 5%	592
March	1st to 10th	Night	9% 5% 27% 39% 17% 3	720
	11th to 20th	Night	10% 4 30% 38% 15% 3	720
	21st to end	Night	13% 4 27% 37% 16% 3	792
April	1st to 10th	Night	10% 7% 26% 34% 21% 2	613
	11th to 20th	Night	14% 5% 29% 35% 15% 1	533
	21st to end	Night	16% 7% 23% 37% 15% 2	540
May	1st to 10th	Night	16% 7% 22% 36% 17% 2	423
	11th to 20th	Night	12% 4 23% 39% 20% 1	354
	21st to end	Night	20% 5% 24% 29% 20% 3	389
June	1st to 10th	Night	18% 8% 22% 36% 14% 3	360
	11th to 20th	Night	20% 6% 21% 32% 19% 2	360
	21st to end	Night	10% 4 21% 34% 26% 4	360
July	1st to 10th	Night	14% 3 16% 41% 24% 2	350
	11th to 20th	Night	11% 3 21% 44% 21% 1	348
	21st to end	Night	9% 5% 17% 42% 24% 3	394
August	1st to 10th	Night	11% 3 21% 32% 30% 4	358
	11th to 20th	Night	12% 4 18% 36% 27% 2	486
	21st to end	Night	12% 3 21% 38% 26% 1	594
September	1st to 10th	Night	14% 3 20% 39% 22% 2	556
	11th to 20th	Night	15% 4 21% 40% 18% 2	720
	21st to end	Night	11% 3 29% 40% 14% 2	720
October	1st to 10th	Night	15% 3 28% 39% 14% 1	720
	11th to 20th	Night	13% 5% 32% 35% 14% 2	720
	21st to end	Night	13% 7% 34% 34% 11%	812
November	1st to 10th	Night	18% 7% 32% 32% 9% 2	925
	11th to 20th	Night	12% 9% 35% 31% 11% 3	950
	21st to end	Night	9% 6% 40% 33% 10% 2	950
December	1st to 10th	Night	12% 8% 33% 31% 13% 3	950
	11th to 20th	Night	9% 7% 34% 36% 12% 2	950
	21st to end	Night	9% 4 31% 37% 15% 3	1045

Page generated at 2024-01-09 05:14:38. Version ac07

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