Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 11%

04:04

17:52

05 Bad
06 Bad
07 Bad
08 Bad
09 Good
10 Good
11 OK
12 OK
13 OK
14 OK
15 OK
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Good

Sun - Rise: 06:37, Set: 18:58, Transit: 12:48. Moon - Rise: 04:04, Set: 17:52. Civil Dark: 19:27 - 06:08. Nautical Dark: 20:02 - 05:33. Astro Dark: 20:38 - 04:58

Total Clouds (% Sky Obscured)

51
62
71
59
0
5
31
24
27
36
39
66
74
56
81
85
89
88
85
92
77
89
85
9

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
39
1
5
28
33
36
63
74
70
74
73
78
71
3

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
14
2
32
39
61
42
17
50
50
55
42
38
67
45
38
19
0

High Clouds (% Sky Obscured)

51
62
71
59
0
5
29
24
27
5
1
1
1
0
0
0
0
0
0
1
2
12
15
2

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
1
2
4
8
21
10
2
0
1
2
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

3
4
4
7
9
10
10
11
11
11
11
11
12
9
8
7
8
9
10
10
10
9
8
7

Chance of Frost

Temperature (°C)

13
13
14
17
18
20
22
24
25
26
27
27
26
24
23
22
22
20
19
18
17
16
15
15

Feels Like (°C)

12
11
12
15
17
19
20
22
23
24
25
26
24
23
22
21
20
18
17
15
14
13
12
12

Dew Point (°C)

7
7
7
9
8
8
10
11
11
11
9
11
15
17
16
15
15
14
13
12
10
9
8
8

Relative Humidity (%)

64
65
65
59
50
45
45
43
41
37
32
36
52
63
64
64
66
68
68
66
64
61
60
62

Pressure (mb)

1014
1014
1014
1014
1014
1014
1013
1013
1012
1011
1011
1010
1010
1011
1011
1012
1013
1013
1014
1014
1015
1015
1015
1016

Ozone (du)

285
285
286
286
287
289
292
289
289
289
290
290
289
290
292
290
286
284
283
283
281
282
283
285

Friday 19

Waning Crescent 5%

No Rise

18:11

05 OK
06 OK
07 Good
08 Good
09 Good
10 Good
11 OK
12 OK
13 OK
14 OK
15 OK
16 OK
17 OK
18 Good
19 Good
20 Good
21 Good
22 Good
23 Good
00 Good
01 Good
02 Good
03 Good
04 Good

Sun - Rise: 06:39, Set: 18:56, Transit: 12:47. Moon - Rise: No Rise, Set: 18:11. Civil Dark: 19:25 - 06:09. Nautical Dark: 20:00 - 05:34. Astro Dark: 20:36 - N/A

Total Clouds (% Sky Obscured)

24
22
13
15
16
18
26
20
22
33
21
38
23
2
0
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

2
0
10
15
16
18
26
20
22
33
21
38
19
2
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
11
0
17
18
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

18
14
4
2
2
2
1
0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

6
5
5
6
6
7
6
6
6
6
6
6
9
9
9
8
8
8
9
8
7
6
5
5

Chance of Frost

Temperature (°C)

14
13
12
13
14
15
16
17
18
18
19
19
19
19
18
16
15
13
12
11
10
9
9
8

Feels Like (°C)

13
11
10
12
13
13
15
16
17
17
18
18
17
16
15
14
12
11
9
9
8
8
7
7

Dew Point (°C)

7
6
6
5
3
3
2
2
1
1
-0
-1
-2
-1
-1
-2
-2
-2
-3
-3
-4
-4
-4
-3

Relative Humidity (%)

63
64
64
58
49
45
40
36
32
30
27
25
24
25
27
30
32
34
36
37
38
40
42
44

Pressure (mb)

1016
1016
1017
1018
1018
1018
1018
1018
1018
1018
1018
1018
1018
1018
1019
1020
1021
1023
1023
1024
1025
1026
1026
1027

Ozone (du)

285
286
288
287
286
285
284
284
285
286
286
283
283
282
280
278
281
284
286
285
284
283
283
283

Saturday 20

Waning Crescent 1%

05:14

18:28

05 Good
06 Good
07 Good
08 Good
09 Good
10 Good
11 Good
12 Good
13 Good
14 Good
15 Good
16 Good
17 Good
18 Good
19 Good
20 Good
21 Good
22 Good
23 Good
00 Good
01 Good
02 Good
03 Good
04 Good

Sun - Rise: 06:40, Set: 18:54, Transit: 12:47. Moon - Rise: 05:14, Set: 18:28. Civil Dark: 19:23 - 06:10. Nautical Dark: 19:58 - 05:35. Astro Dark: 20:34 - 05:00

Total Clouds (% Sky Obscured)

0
2
2
1
1
1
0
1
2
2
0
0
0
0
0
0
0
1
2
1
17
18
15
5

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
2
2
1
1
1
0
1
2
2
0
0
0
0
0
0
0
1
2
1
17
18
15
3

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

4
4
4
4
4
4
3
3
4
4
4
3
2
1
3
4
4
4
3
3
3
3
3
3

Chance of Frost

Temperature (°C)

8
8
7
8
9
11
12
13
14
15
16
16
16
16
14
13
12
11
11
10
10
9
9
8

Feels Like (°C)

6
6
6
7
8
9
11
12
13
14
14
15
16
16
13
12
11
10
10
9
9
7
7
6

Dew Point (°C)

-3
-2
-3
-3
-3
-4
-5
-6
-7
-7
-7
-7
-7
-6
-4
-4
-3
-2
-2
-2
-2
-2
-2
-2

Relative Humidity (%)

48
50
49
47
42
36
31
26
23
21
20
20
20
23
27
30
35
40
42
44
46
46
47
48

Pressure (mb)

1027
1027
1028
1029
1029
1029
1029
1029
1029
1028
1027
1027
1026
1027
1027
1027
1028
1028
1028
1028
1028
1028
1028
1028

Ozone (du)

282
281
280
279
279
278
278
279
279
278
278
277
276
277
280
281
281
282
281
280
279
280
280
281

Sunday 21

New Moon 0%

06:22

18:44

05 Good
06 Good
07 Good
08 Good
09 Good
10 Good
11 OK
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 OK
18 Bad
19 OK
20 Good
21 Good
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Good
04 OK

Sun - Rise: 06:41, Set: 18:52, Transit: 12:46. Moon - Rise: 06:22, Set: 18:44. Civil Dark: 19:21 - 06:12. Nautical Dark: 19:56 - 05:37. Astro Dark: 20:32 - 05:01

Total Clouds (% Sky Obscured)

2
2
2
3
14
15
37
69
100
100
100
100
42
67
48
11
12
63
63
57
55
50
14
43

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
4
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

1
1
1
2
9
5
35
68
100
100
100
100
42
37
9
6
11
34
36
34
32
23
14
8

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

4
3
4
4
4
4
5
5
5
5
6
6
7
5
5
4
5
5
5
5
4
4
4
5

Chance of Frost

Temperature (°C)

8
8
8
8
11
13
15
17
19
20
21
21
21
20
18
17
16
15
15
14
14
14
13
13

Feels Like (°C)

6
7
6
7
9
11
12
14
16
17
17
18
18
19
16
15
16
15
13
13
12
12
12
13

Dew Point (°C)

-2
-2
-1
-2
-2
-2
-2
-3
-3
-2
-1
-0
1
2
4
5
6
7
8
8
8
8
9
9

Relative Humidity (%)

50
52
53
49
43
36
31
25
23
23
23
24
26
30
38
43
50
57
63
66
69
70
74
75

Pressure (mb)

1027
1027
1028
1027
1027
1027
1027
1026
1025
1024
1023
1023
1022
1022
1021
1021
1021
1021
1020
1020
1020
1020
1020
1019

Ozone (du)

282
280
280
280
280
280
280
281
281
282
283
283
285
280
279
279
279
279
279
280
280
280
279
280

Monday 22

Waxing Crescent 1%

07:29

19:00

05 Bad
06 OK
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad

Sun - Rise: 06:42, Set: 18:50, Transit: 12:46. Moon - Rise: 07:29, Set: 19:00. Civil Dark: 19:19 - 06:13. Nautical Dark: 19:54 - 05:38. Astro Dark: 20:30 - 05:03

Total Clouds (% Sky Obscured)

49
42
82
65
95
97
94
93
92
71
66
93
93
93
88
93
97
100
100
100
100
97
94
92

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
24
0
11
60
70
66
66
61
46
40
34
39
49
72
75
72

Medium Clouds (% Sky Obscured)

15
29
44
40
34
47
48
71
77
50
15
77
68
63
53
43
44
52
55
68
77
70
58
46

High Clouds (% Sky Obscured)

29
42
71
65
79
85
73
63
50
32
30
37
34
10
29
38
65
76
80
75
71
72
71
72

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
5
2
5
7
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
None
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None

Precipitation Probability (%)

0
0
0
0
0
0
1
0
0
0
1
4
18
41
25
52
69
83
86
85
82
65
56
49

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0
0.3
0.5
0.7
0.8
0.8
0.8
0.4
0
0

Wind Speed/Direction (mph)

5
6
8
8
9
10
10
9
9
8
9
8
6
6
5
5
5
7
7
7
6
6
6
6

Chance of Frost

Temperature (°C)

13
13
13
14
16
18
20
21
22
23
25
25
23
22
21
20
20
19
19
19
19
18
18
18

Feels Like (°C)

11
11
12
12
13
14
17
18
20
21
23
24
23
22
22
21
21
20
21
20
20
20
19
19

Dew Point (°C)

8
8
8
7
7
7
8
8
9
10
9
11
14
15
17
17
17
18
18
18
18
18
18
17

Relative Humidity (%)

71
70
69
63
54
49
45
41
42
45
37
42
56
64
80
84
86
91
96
96
96
95
96
96

Pressure (mb)

1019
1019
1019
1019
1018
1018
1017
1016
1015
1014
1013
1013
1013
1012
1012
1012
1012
1012
1012
1012
1011
1011
1011
1011

Ozone (du)

280
279
278
276
276
276
277
277
278
277
277
274
274
273
272
271
270
270
269
270
271
271
272
272

Tuesday 23

Waxing Crescent 4%

08:35

19:17

05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad

Sun - Rise: 06:43, Set: 18:48, Transit: 12:46. Moon - Rise: 08:35, Set: 19:17. Civil Dark: 19:17 - 06:14. Nautical Dark: 19:52 - 05:39. Astro Dark: 20:28 - 05:04

Total Clouds (% Sky Obscured)

95
98
100
100
100
100
94
86
78
73
70
68
63
61
57
64
72
78
83
89
92
95
97
100

Low Clouds (% Sky Obscured)

76
73
73
78
83
87
76
65
56
54
54
54
52
49
48
47
47
48
56
65
73
75
77
78

Medium Clouds (% Sky Obscured)

49
55
59
58
59
55
48
39
32
43
56
63
51
45
39
37
29
16
27
39
52
68
84
100

High Clouds (% Sky Obscured)

65
57
49
55
64
73
55
39
25
38
55
68
51
28
19
15
15
10
4
4
14
46
64
58

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
8
7
6
7
8
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

50
48
41
36
30
24
32
35
37
45
54
61
63
60
51
42
31
10
15
15
11
21
24
22

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0.2
0.3
0.2
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

6
6
6
6
5
5
5
5
5
6
5
5
5
5
6
6
6
6
6
6
6
6
6
6

Chance of Frost

Temperature (°C)

18
18
18
18
19
20
20
21
22
23
23
22
22
21
21
20
20
19
19
18
18
18
17
17

Feels Like (°C)

19
19
19
19
20
20
21
21
21
20
26
25
25
25
25
25
21
21
20
20
20
20
18
17

Dew Point (°C)

17
18
17
18
18
19
20
19
19
19
19
19
19
19
19
19
18
18
17
17
17
16
16
15

Relative Humidity (%)

96
98
96
96
96
95
95
88
83
76
79
81
84
87
89
92
92
92
92
93
92
92
90
87

Pressure (mb)

1011
1011
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1013
1013
1014
1014
1014
1015
1015
1015
1015
1016

Ozone (du)

273
273
273
273
271
269
267
267
267
267
268
268
268
269
270
270
271
271
272
272
272
272
273
273

Wednesday 24

Waxing Crescent 8%

09:42

19:35

05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad

Sun - Rise: 06:45, Set: 18:46, Transit: 12:45. Moon - Rise: 09:42, Set: 19:35. Civil Dark: 19:16 - 06:15. Nautical Dark: 19:50 - 05:41. Astro Dark: 20:25 - 05:05

Total Clouds (% Sky Obscured)

99
98
92
88
74
74
89
97
96
96
95
95
84
74
59
67
74
84
84
83
76

Low Clouds (% Sky Obscured)

71
63
56
59
63
66
60
54
51
55
58
61
53
49
42
48
47
44
42
44
38

Medium Clouds (% Sky Obscured)

87
72
59
66
69
74
88
86
84
75
67
60
40
21
1
7
12
14
7
6
2

High Clouds (% Sky Obscured)

57
63
70
70
59
59
62
50
38
35
19
3
3
2
2
15
28
41
29
17
5

ISS Passover

Visibility (miles)

9
8
7
5
6
7
8
8
8
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

32
43
51
55
55
54
50
47
44
41
36
25
19
14
8
7
5
0
1
1
0

Precipitation Amount (mm)

0
0
0.2
0.3
0.3
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

6
6
6
6
6
6
6
5
5
6
6
6
5
5
5
5
4
4
4
4
4

Chance of Frost

Temperature (°C)

17
17
17
16
17
18
18
19
20
22
22
22
22
21
21
20
20
19
19
19
18

Feels Like (°C)

17
17
17
17
16
17
17
17
17
17
23
23
23
23
23
23
21
21
21
21
21

Dew Point (°C)

14
15
15
15
16
16
17
17
18
18
18
18
19
18
18
18
18
18
18
18
17

Relative Humidity (%)

86
89
90
93
92
92
92
88
84
80
80
80
80
83
86
91
92
93
93
93
92

Pressure (mb)

1016
1017
1017
1018
1018
1018
1019
1019
1018
1018
1018
1018
1017
1018
1018
1018
1018
1018
1018
1018
1018

Ozone (du)

274
274
275
275
275
275
275
275
275
275
275
274
273
273
272
272
271
271
271
270
269

Forecast for Le Vieux-Port, Montréal, Canada (45.50,-73.57)

Generated: 18/09/25 05:03:43. Forecast: 18/09/25 to 24/09/25. Timezone: UTC-4.00