Miramichi City (Newcastle)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Miramichi City (Newcastle) clear sky chart from 2005-11-06 to 2024-01-31.

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	20% 9% 3 6% 6% 3 5% 4 5% 6% 33%	74808
	Night	19% 9% 4 6% 5% 3 4 4 5% 6% 34%	75315
Transparency	Day	51% 6% 12% 20% 10% 1	74503
	Night	51% 6% 12% 20% 10% 1	75156
Seeing	Day	26% 17% 31% 18% 6% 1	15393
	Night	25% 15% 33% 21% 6%	23267

By Month

Percentage Cloud Cover NE (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	17% 14% 5% 8% 6% 3 4 4 5% 4 30%	1327
	11th to 20th	Day	19% 14% 4 8% 6% 4 5% 3 5% 5% 27%	1377
	21st to end	Day	12% 8% 3 6% 5% 4 4 4 5% 7% 41%	1800
February	1st to 10th	Day	13% 12% 4 8% 6% 3 5% 5% 6% 5% 33%	1620
	11th to 20th	Day	17% 13% 4 8% 7% 4 4 5% 5% 6% 28%	1573
	21st to end	Day	11% 12% 6% 8% 7% 4 6% 5% 3 6% 33%	1373
March	1st to 10th	Day	17% 15% 4 6% 5% 3 6% 4 4 5% 31%	1914
	11th to 20th	Day	16% 11% 5% 8% 7% 3 4 4 4 5% 34%	1980
	21st to end	Day	20% 12% 4 7% 4 3 4 3 4 5% 33%	2178
April	1st to 10th	Day	23% 11% 5% 7% 6% 4 4 3 4 6% 27%	2119
	11th to 20th	Day	22% 9% 3 5% 5% 3 4 3 5% 5% 37%	2312
	21st to end	Day	28% 10% 4 5% 5% 3 4 3 4 6% 29%	2340
May	1st to 10th	Day	27% 8% 4 7% 6% 2 4 3 3 5% 30%	2384
	11th to 20th	Day	25% 10% 3 6% 5% 3 4 3 3 6% 33%	2478
	21st to end	Day	21% 7% 3 6% 4 3 5% 5% 6% 8% 32%	2814
June	1st to 10th	Day	28% 8% 4 6% 5% 3 4 4 5% 6% 27%	2700
	11th to 20th	Day	21% 6% 2 6% 6% 4 4 5% 5% 7% 34%	2700
	21st to end	Day	29% 7% 3 7% 5% 3 4 4 6% 6% 26%	2700
July	1st to 10th	Day	18% 7% 3 6% 6% 4 6% 5% 6% 9% 31%	2700
	11th to 20th	Day	13% 6% 4 6% 7% 5% 6% 6% 7% 9% 33%	2700
	21st to end	Day	18% 7% 3 6% 7% 4 6% 6% 7% 8% 29%	2740
August	1st to 10th	Day	17% 7% 3 5% 6% 4 5% 6% 6% 8% 33%	2327
	11th to 20th	Day	15% 8% 3 6% 7% 3 5% 6% 7% 7% 32%	2304
	21st to end	Day	16% 5% 2 6% 5% 3 4 5% 6% 8% 39%	2566
September	1st to 10th	Day	16% 5% 3 7% 5% 3 4 4 5% 8% 39%	2160
	11th to 20th	Day	19% 7% 3 5% 5% 2 4 4 4 4 44%	2015
	21st to end	Day	20% 6% 2 4 5% 2 4 4 4 6% 42%	1975
October	1st to 10th	Day	15% 7% 2 5% 6% 3 5% 4 4 6% 42%	1800
	11th to 20th	Day	21% 8% 3 6% 5% 3 4 5% 4 6% 37%	1800
	21st to end	Day	25% 9% 2 6% 5% 2 5% 4 3 6% 32%	1885
November	1st to 10th	Day	21% 9% 3 5% 5% 3 5% 5% 5% 6% 32%	1521
	11th to 20th	Day	19% 10% 4 5% 6% 4 4 4 5% 7% 32%	1520
	21st to end	Day	20% 11% 3 6% 6% 3 4 4 4 6% 32%	1520
December	1st to 10th	Day	22% 13% 3 6% 5% 4 4 4 4 6% 30%	1487
	11th to 20th	Day	19% 13% 4 9% 7% 3 5% 4 4 5% 28%	1668
	21st to end	Day	19% 11% 4 6% 5% 3 4 4 3 4 38%	2431
January	1st to 10th	Night	15% 12% 5% 9% 6% 4 5% 5% 5% 6% 27%	2838
	11th to 20th	Night	18% 11% 4 6% 6% 3 4 4 5% 7% 31%	2798
	21st to end	Night	13% 9% 3 7% 5% 4 4 5% 6% 6% 38%	2780
February	1st to 10th	Night	14% 12% 4 6% 6% 3 5% 5% 6% 5% 34%	2340
	11th to 20th	Night	18% 13% 5% 6% 6% 4 5% 4 5% 5% 30%	2273
	21st to end	Night	14% 13% 5% 6% 6% 4 5% 5% 5% 5% 32%	1880
March	1st to 10th	Night	18% 14% 4 6% 6% 3 5% 4 4 4 32%	2032
	11th to 20th	Night	18% 8% 4 6% 6% 4 6% 4 4 5% 34%	1979
	21st to end	Night	17% 10% 5% 9% 5% 3 5% 4 4 5% 34%	2178
April	1st to 10th	Night	27% 11% 3 6% 6% 3 4 4 5% 5% 28%	1835
	11th to 20th	Night	22% 9% 3 6% 5% 3 4 4 5% 5% 34%	1598
	21st to end	Night	25% 11% 4 5% 5% 2 4 5% 3 6% 31%	1620
May	1st to 10th	Night	23% 10% 4 5% 6% 2 4 3 5% 6% 32%	1575
	11th to 20th	Night	23% 7% 3 6% 6% 3 4 4 5% 6% 34%	1416
	21st to end	Night	16% 7% 3 7% 6% 3 4 5% 6% 8% 34%	1474
June	1st to 10th	Night	27% 7% 3 6% 6% 3 4 3 4 5% 32%	1260
	11th to 20th	Night	20% 6% 2 5% 5% 3 4 6% 6% 6% 37%	1260
	21st to end	Night	29% 7% 3 5% 5% 2 4 5% 4 6% 29%	1260
July	1st to 10th	Night	16% 8% 3 6% 4 3 5% 6% 5% 8% 36%	1260
	11th to 20th	Night	15% 7% 3 4 7% 3 6% 5% 6% 8% 37%	1260
	21st to end	Night	16% 7% 4 6% 6% 3 5% 5% 5% 7% 35%	1554
August	1st to 10th	Night	16% 5% 2 6% 6% 3 6% 5% 5% 7% 39%	1612
	11th to 20th	Night	16% 8% 4 6% 6% 3 5% 6% 6% 8% 33%	1596
	21st to end	Night	13% 6% 2 5% 5% 3 4 5% 6% 8% 44%	1789
September	1st to 10th	Night	17% 5% 3 6% 4 2 2 4 4 7% 46%	1800
	11th to 20th	Night	15% 6% 2 5% 5% 2 3 4 5% 6% 48%	1943
	21st to end	Night	19% 5% 2 5% 4 3 3 3 4 6% 45%	1984
October	1st to 10th	Night	19% 6% 2 5% 4 3 4 5% 5% 6% 42%	2160
	11th to 20th	Night	19% 8% 3 5% 5% 3 4 3 3 7% 39%	2160
	21st to end	Night	23% 9% 4 5% 5% 3 4 3 4 6% 35%	2470
November	1st to 10th	Night	21% 8% 4 5% 5% 3 5% 3 5% 5% 35%	2556
	11th to 20th	Night	22% 9% 4 5% 6% 4 4 4 5% 7% 31%	2660
	21st to end	Night	21% 9% 3 7% 6% 3 4 4 5% 6% 32%	2660
December	1st to 10th	Night	23% 11% 4 6% 6% 2 4 4 4 5% 31%	2688
	11th to 20th	Night	24% 11% 4 7% 6% 3 4 4 5% 5% 28%	3531
	21st to end	Night	20% 11% 4 7% 6% 3 4 3 4 5% 31%	5236

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	56% 5% 12% 16% 10% 1	1328
	11th to 20th	Day	59% 6% 9% 13% 12% 1	1377
	21st to end	Day	43% 5% 12% 22% 17% 2	1800
February	1st to 10th	Day	51% 7% 10% 19% 11% 2	1620
	11th to 20th	Day	57% 4 10% 18% 9% 1	1581
	21st to end	Day	52% 4 9% 21% 12% 2	1373
March	1st to 10th	Day	56% 6% 9% 20% 9% 1	1918
	11th to 20th	Day	53% 5% 11% 19% 9% 3	1980
	21st to end	Day	55% 4 8% 17% 12% 4	2178
April	1st to 10th	Day	59% 4 8% 15% 11% 3	2119
	11th to 20th	Day	50% 5% 10% 21% 13% 2	2312
	21st to end	Day	58% 5% 8% 14% 11% 4	2340
May	1st to 10th	Day	58% 5% 7% 17% 11% 1	2384
	11th to 20th	Day	54% 5% 10% 19% 11% 1	2482
	21st to end	Day	48% 7% 12% 22% 10% 1	2814
June	1st to 10th	Day	58% 6% 11% 16% 8% 1	2700
	11th to 20th	Day	49% 7% 12% 20% 11% 2	2700
	21st to end	Day	58% 6% 11% 16% 9%	2700
July	1st to 10th	Day	48% 7% 17% 20% 7%	2625
	11th to 20th	Day	45% 8% 15% 23% 9% 1	2619
	21st to end	Day	50% 8% 16% 19% 8%	2587
August	1st to 10th	Day	47% 8% 15% 22% 8%	2314
	11th to 20th	Day	49% 8% 15% 21% 7%	2304
	21st to end	Day	42% 7% 16% 24% 11%	2566
September	1st to 10th	Day	42% 8% 14% 24% 13%	2160
	11th to 20th	Day	43% 5% 11% 24% 15% 1	2015
	21st to end	Day	44% 6% 10% 25% 15% 1	1975
October	1st to 10th	Day	43% 5% 13% 26% 12% 1	1800
	11th to 20th	Day	48% 7% 15% 22% 8% 1	1800
	21st to end	Day	53% 6% 11% 19% 10% 1	1885
November	1st to 10th	Day	51% 5% 12% 21% 9% 1	1521
	11th to 20th	Day	52% 5% 14% 15% 12% 1	1520
	21st to end	Day	54% 6% 15% 17% 8%	1520
December	1st to 10th	Day	56% 6% 14% 18% 7%	1487
	11th to 20th	Day	61% 4 10% 15% 9% 1	1668
	21st to end	Day	51% 7% 11% 17% 11% 3	2431
January	1st to 10th	Night	57% 6% 13% 16% 8% 1	2838
	11th to 20th	Night	53% 6% 12% 18% 10% 1	2798
	21st to end	Night	46% 5% 10% 23% 13% 2	2780
February	1st to 10th	Night	50% 6% 12% 17% 12% 3	2340
	11th to 20th	Night	57% 5% 10% 16% 11% 2	2276
	21st to end	Night	54% 5% 8% 18% 13% 2	1880
March	1st to 10th	Night	55% 5% 8% 19% 11% 2	2041
	11th to 20th	Night	52% 4 10% 18% 13% 2	1980
	21st to end	Night	53% 5% 7% 19% 12% 3	2178
April	1st to 10th	Night	59% 4 9% 15% 10% 3	1835
	11th to 20th	Night	50% 6% 10% 18% 14% 2	1598
	21st to end	Night	56% 4 9% 15% 13% 3	1620
May	1st to 10th	Night	54% 5% 9% 18% 11% 2	1575
	11th to 20th	Night	51% 6% 11% 19% 12% 1	1417
	21st to end	Night	47% 8% 13% 20% 10% 1	1475
June	1st to 10th	Night	56% 4 11% 20% 9% 1	1260
	11th to 20th	Night	48% 7% 10% 25% 8% 2	1260
	21st to end	Night	56% 8% 11% 17% 8% 1	1260
July	1st to 10th	Night	45% 9% 15% 23% 8%	1225
	11th to 20th	Night	44% 9% 15% 23% 9% 1	1218
	21st to end	Night	48% 8% 14% 22% 8%	1468
August	1st to 10th	Night	44% 9% 16% 25% 7%	1600
	11th to 20th	Night	47% 9% 18% 21% 5%	1596
	21st to end	Night	37% 8% 17% 27% 11%	1789
September	1st to 10th	Night	39% 7% 13% 29% 13% 1	1800
	11th to 20th	Night	38% 6% 14% 28% 14% 1	1943
	21st to end	Night	40% 6% 11% 27% 14% 1	1984
October	1st to 10th	Night	42% 6% 12% 25% 13% 1	2160
	11th to 20th	Night	47% 4 13% 26% 9%	2160
	21st to end	Night	51% 6% 12% 21% 10%	2470
November	1st to 10th	Night	51% 5% 12% 21% 10% 1	2556
	11th to 20th	Night	53% 6% 13% 18% 10% 1	2660
	21st to end	Night	54% 7% 14% 16% 8%	2660
December	1st to 10th	Night	56% 6% 11% 19% 7%	2688
	11th to 20th	Night	58% 5% 9% 18% 8%	3532
	21st to end	Night	54% 7% 12% 17% 8% 1	5236

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	29% 21% 34% 16% 1	180
	11th to 20th	Day	38% 21% 24% 11% 5% 1	180
	21st to end	Day	19% 21% 34% 19% 6% 1	332
February	1st to 10th	Day	28% 21% 29% 18% 3 1	340
	11th to 20th	Day	24% 25% 31% 15% 4 1	336
	21st to end	Day	22% 21% 34% 19% 3	299
March	1st to 10th	Day	31% 21% 32% 12% 3 1	420
	11th to 20th	Day	29% 19% 31% 14% 5% 2	420
	21st to end	Day	31% 20% 29% 15% 4 1	462
April	1st to 10th	Day	36% 22% 29% 11% 2 1	420
	11th to 20th	Day	32% 22% 26% 16% 4 1	412
	21st to end	Day	35% 17% 26% 15% 5% 1	420
May	1st to 10th	Day	38% 18% 25% 14% 5% 1	467
	11th to 20th	Day	31% 17% 26% 16% 8% 1	624
	21st to end	Day	28% 18% 33% 16% 5%	680
June	1st to 10th	Day	34% 16% 28% 14% 7% 1	630
	11th to 20th	Day	25% 17% 29% 21% 6% 1	630
	21st to end	Day	30% 13% 29% 23% 6%	630
July	1st to 10th	Day	20% 14% 37% 19% 9% 1	620
	11th to 20th	Day	15% 11% 40% 25% 8% 1	618
	21st to end	Day	17% 13% 37% 24% 8% 1	610
August	1st to 10th	Day	15% 12% 40% 24% 7% 2	446
	11th to 20th	Day	19% 11% 29% 29% 10% 1	439
	21st to end	Day	19% 13% 30% 25% 11% 2	495
September	1st to 10th	Day	17% 14% 36% 23% 8% 2	450
	11th to 20th	Day	24% 14% 34% 19% 7% 2	450
	21st to end	Day	22% 16% 34% 17% 7% 4	447
October	1st to 10th	Day	20% 16% 28% 22% 11% 2	360
	11th to 20th	Day	28% 16% 28% 17% 9% 2	360
	21st to end	Day	32% 21% 28% 13% 6% 1	396
November	1st to 10th	Day	28% 18% 32% 16% 4 1	365
	11th to 20th	Day	28% 21% 28% 15% 6% 1	370
	21st to end	Day	32% 20% 31% 14% 3 1	370
December	1st to 10th	Day	31% 18% 30% 18% 4 1	337
	11th to 20th	Day	37% 21% 33% 7% 3	180
	21st to end	Day	30% 20% 33% 14% 2	198
January	1st to 10th	Night	23% 19% 35% 18% 4	850
	11th to 20th	Night	26% 19% 32% 19% 4	826
	21st to end	Night	18% 20% 35% 22% 5%	835
February	1st to 10th	Night	22% 19% 36% 18% 5%	720
	11th to 20th	Night	28% 20% 34% 14% 4	703
	21st to end	Night	23% 16% 36% 20% 4	592
March	1st to 10th	Night	27% 16% 37% 18% 2	720
	11th to 20th	Night	25% 18% 34% 17% 6% 1	720
	21st to end	Night	22% 18% 36% 19% 5%	792
April	1st to 10th	Night	32% 17% 30% 18% 3	593
	11th to 20th	Night	29% 13% 36% 15% 6%	534
	21st to end	Night	34% 14% 26% 21% 4 1	540
May	1st to 10th	Night	29% 16% 29% 22% 4	540
	11th to 20th	Night	28% 11% 34% 20% 6%	532
	21st to end	Night	19% 20% 36% 21% 4	507
June	1st to 10th	Night	31% 8% 29% 26% 5%	360
	11th to 20th	Night	23% 11% 29% 28% 9%	360
	21st to end	Night	31% 7% 28% 26% 8%	360
July	1st to 10th	Night	19% 9% 42% 22% 8%	350
	11th to 20th	Night	17% 4 35% 34% 9%	348
	21st to end	Night	18% 10% 31% 32% 8%	499
August	1st to 10th	Night	17% 7% 35% 32% 9%	538
	11th to 20th	Night	17% 6% 30% 36% 10% 1	532
	21st to end	Night	16% 10% 30% 31% 12% 1	594
September	1st to 10th	Night	20% 9% 39% 25% 7%	540
	11th to 20th	Night	20% 11% 33% 27% 9% 1	683
	21st to end	Night	21% 13% 34% 22% 9%	720
October	1st to 10th	Night	23% 11% 33% 24% 9% 1	720
	11th to 20th	Night	22% 14% 36% 20% 8%	720
	21st to end	Night	27% 20% 32% 17% 4	792
November	1st to 10th	Night	29% 15% 32% 19% 4	812
	11th to 20th	Night	29% 18% 28% 17% 6% 1	850
	21st to end	Night	29% 19% 28% 20% 5%	850
December	1st to 10th	Night	30% 15% 35% 16% 4	850
	11th to 20th	Night	29% 20% 33% 15% 3	850
	21st to end	Night	29% 19% 30% 17% 3 1	935

Page generated at 2024-01-28 06:26:33. Version ac07

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