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For how long does the twilight last?

Guidance

Civil twilight

Nautical twilight

Astronomical twilight

Entire twilight

Entire twilight (civil, nautical and astronomical)

Guidance to the tables

The tables show for how many minutes the civil twilight lasts. Civil twilight is the time when the entire Sun is below the horizon, but the centre of the Sun is less than 6° below the horizon.

Italicized numbers refer to polar night. At those times, there is no daytime between the two periods of twilight. As morning twilight ends, evening twilight begins. In these cases, the entire duration of the civil twilight is twice as much as the table shows.

Numbers in bold type mean that the twilight lasts all night. In these cases, the table shows the duration from sunset to solar midnight. The entire twilight, from sunset to sunrise, lasts twice as long as the table shows.

Northern hemisphere – duration of twilight in 2021

Latitude
N
10°
N
20°
N
30°
N
35°
N
40°
N
45°
N
50°
N
52°
N
54°
N
56°
N
58°
N
60°
N
62°
N
64°
N
66°
N
68°
N
70°
N
72°
Jan. 1 22 23 24 26 28 30 34 38 41 43 47 51 57 64 75 94 167 135 82
11 22 23 24 26 28 30 33 37 40 42 45 49 54 60 69 83 110 160 122
21 22 22 23 26 27 29 32 36 38 41 43 47 51 56 63 72 87 116 166
31 22 22 23 25 27 29 31 35 37 39 41 44 48 52 57 64 73 87 112
Feb. 10 21 22 23 25 26 28 31 34 35 37 40 42 45 48 53 58 64 73 86
20 21 21 22 24 26 28 30 33 34 36 38 40 43 46 50 54 59 66 74
Mar. 2 21 21 22 24 25 27 29 32 34 35 37 39 42 45 48 52 56 62 69
12 21 21 22 24 25 27 29 32 34 35 37 39 41 44 47 51 55 61 67
22 21 21 22 24 25 27 29 32 34 35 37 39 42 45 48 52 56 62 69
Apr. 1 21 21 22 24 25 27 30 33 34 36 38 40 43 46 50 54 60 66 76
11 21 21 22 24 26 28 30 34 35 37 40 42 45 49 53 59 66 76 91
21 21 22 23 25 26 29 31 35 37 39 42 45 49 53 59 67 79 100 181
May 1 21 22 23 25 27 29 32 37 39 42 45 49 54 60 69 84 115 150 110
11 22 22 23 26 28 30 34 39 41 44 48 54 60 71 88 159 129 81 0
21 22 23 24 27 29 31 35 41 44 48 53 60 70 88 150 119 68 0 0
31 22 23 24 27 29 32 36 43 46 51 57 67 83 142 121 76 0 0 0
Jun. 10 22 23 24 27 30 33 37 44 48 54 61 73 98 134 99 24 0 0 0
20 23 23 25 27 30 33 37 45 49 55 63 76 107 128 89 0 0 0 0
30 22 23 25 27 30 33 37 44 48 54 61 74 99 133 97 12 0 0 0
Jul. 10 22 23 24 27 29 32 36 43 47 51 58 68 85 148 118 70 0 0 0
20 22 23 24 27 29 31 35 41 44 48 53 61 72 92 146 113 56 0 0
30 22 22 24 26 28 30 34 39 42 45 49 54 62 73 92 153 121 67 0
Aug. 9 21 22 23 25 27 30 33 37 39 42 45 49 54 61 71 88 132 141 96
19 21 22 23 25 27 29 31 35 37 40 42 45 49 54 61 69 83 108 170
29 21 21 22 24 26 28 31 34 36 38 40 43 46 50 54 60 68 79 96
Sep. 8 21 21 22 24 26 27 30 33 35 36 38 41 43 46 50 55 61 68 78
18 21 21 22 24 25 27 29 32 34 35 37 39 42 45 48 52 57 63 70
28 21 21 22 24 25 27 29 32 34 35 37 39 41 44 47 51 55 61 67
Oct. 8 21 21 22 24 25 27 29 32 34 35 37 39 42 44 48 51 56 61 68
18 21 21 22 24 26 27 30 33 34 36 38 40 43 46 49 53 58 64 72
28 21 22 23 25 26 28 30 34 35 37 39 42 44 48 52 57 63 71 82
Nov. 7 22 22 23 25 26 28 31 35 36 38 41 43 47 51 56 62 70 82 102
17 22 22 23 25 27 29 32 36 38 40 43 46 50 55 61 69 82 104 180
27 22 22 24 26 28 30 33 37 39 42 45 48 53 59 67 79 102 170 135
Dec. 7 22 23 24 26 28 30 33 38 40 43 46 51 56 63 74 91 142 141 93
17 23 23 24 26 28 31 34 38 41 44 47 52 58 66 78 100 160 125 64
27 23 23 24 26 28 31 34 38 41 44 47 52 57 65 77 99 161 127 67
37 22 23 24 26 28 30 33 38 40 43 46 50 55 62 73 89 131 145 100

Southern hemisphere – duration of twilight in 2021

Latitude S
60°
S
58°
S
56°
S
54°
S
52°
S
50°
S
45°
S
40°
S
35°
S
30°
S
20°
S
10°

Jan. 1 96 72 61 53 48 44 37 33 30 27 24 23 22
11 80 65 57 50 46 42 36 32 29 27 24 23 22
21 67 58 52 47 43 40 35 31 28 26 24 22 22
31 58 52 47 44 41 38 33 30 28 26 23 22 22
Feb. 10 52 47 44 41 38 36 32 29 27 25 23 22 21
20 47 44 41 38 36 35 31 28 26 25 23 21 21
Mar. 2 44 41 39 37 35 33 30 28 26 24 22 21 21
12 42 40 38 36 34 33 30 27 25 24 22 21 21
22 41 39 37 35 34 32 29 27 25 24 22 21 21
Apr. 1 41 39 37 35 34 32 29 27 25 24 22 21 21
11 42 40 38 36 34 33 30 27 25 24 22 21 21
21 44 41 39 37 35 33 30 28 26 24 22 21 21
May 1 46 43 40 38 36 34 31 28 26 25 23 22 21
11 48 45 42 39 37 35 32 29 27 25 23 22 22
21 51 47 44 41 39 36 32 29 27 26 23 22 22
31 54 50 46 42 40 37 33 30 28 26 24 23 22
Jun. 10 57 51 47 43 41 38 34 30 28 26 24 23 22
20 58 52 47 44 41 39 34 31 28 26 24 23 23
30 57 51 47 44 41 38 34 30 28 26 24 23 22
Jul. 10 55 50 46 43 40 38 33 30 28 26 24 23 22
20 52 48 44 41 39 37 33 30 27 26 24 22 22
30 49 45 42 40 37 35 32 29 27 25 23 22 22
Aug. 9 46 43 40 38 36 34 31 28 26 25 23 22 21
19 44 41 39 37 35 33 30 28 26 24 23 21 21
29 42 40 38 36 34 33 30 27 26 24 22 21 21
Sep. 8 42 39 37 35 34 32 29 27 25 24 22 21 21
18 41 39 37 35 34 32 29 27 25 24 22 21 21
28 42 40 37 36 34 32 29 27 25 24 22 21 21
Oct. 8 44 41 39 36 35 33 30 27 26 24 22 21 21
18 46 43 40 38 36 34 31 28 26 25 22 21 21
28 50 46 43 40 38 36 32 29 27 25 23 22 21
Nov. 7 56 50 46 43 40 37 33 30 27 26 23 22 22
17 64 56 50 46 42 40 34 31 28 26 24 22 22
27 76 63 55 49 45 42 36 32 29 27 24 23 22
Dec. 7 91 70 60 53 47 44 37 32 29 27 24 23 22
17 105 75 62 54 49 45 37 33 30 27 25 23 23
27 103 75 62 54 49 44 37 33 30 27 25 23 23
37 88 69 59 52 47 43 37 32 29 27 24 23 22

Sources

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