Singular Days

(Sendai)
Days when it tends to be fine
Date Fine weather ratio
of the day
[%]		 Fine weather ratio
before and after 10 days
[%]		 Difference of
fine weather ratio
[%]		 Statistic Z
Jan. 20 87.5 71.5 +16.0+2.17
Jan. 27 97.5 71.8 +25.8+3.54
Feb. 8 90.0 71.0 +19.0+2.57
Mar. 2 85.0 68.3 +16.8+2.20
Mar. 6 87.5 72.5 +15.0+2.06
Mar. 14 82.5 67.0 +15.5+2.01
Apr. 3 77.5 60.8 +16.8+2.08
May 6 72.5 53.8 +18.8+2.27
May 10 72.5 56.0 +16.5+2.01
May 19 67.5 50.8 +16.8+2.02
Jun. 7 55.0 38.8 +16.3+2.00
Jun. 15 47.5 29.8 +17.8+2.31
Jun. 23 42.5 22.3 +20.3+2.86
Sep. 1 65.0 39.0 +26.0+3.18
Sep. 20 55.0 38.8 +16.3+2.00
Oct. 2 67.5 49.3 +18.3+2.20
Oct. 10 72.5 53.3 +19.3+2.33
Oct. 16 80.0 59.5 +20.5+2.54
Oct. 25 80.0 64.0 +16.0+2.03
Nov. 4 82.5 66.8 +15.8+2.04
Dec. 21 95.0 73.3 +21.8+3.04
Dec. 30 87.5 73.3 +14.3+1.97

Days when it tends not to be fine
Date Fine weather ratio
of the day
[%]		 Fine weather ratio
before and after 10 days
[%]		 Difference of
fine weather ratio
[%]		 Statistic Z
Feb. 26 52.5 70.0 -17.5-2.27
Mar. 16 52.5 69.5 -17.0-2.20
Mar. 30 50.0 66.8 -16.8-2.12
May 1 37.5 55.0 -17.5-2.12
May 24 40.0 56.8 -16.8-2.03
Jun. 3 22.5 48.8 -26.3-3.17
Aug. 22 25.0 41.8 -16.8-2.06
Oct. 14 37.5 64.3 -26.8-3.32
Oct. 31 52.5 69.3 -16.8-2.16

Days when it tends to rain or snow
Date Precipitation ratio
of the day
[%]		 Precipitation ratio
before and after 10 days
[%]		 Difference of
precipitation ratio
[%]		 Statistic Z
Jan. 22 27.5 14.8 +12.8+2.10
Jan. 29 30.0 16.3 +13.8+2.18
Mar. 16 40.0 22.8 +17.3+2.42
Mar. 30 37.5 23.0 +14.5+2.04
Apr. 8 37.5 23.0 +14.5+2.04
May 14 45.0 25.3 +19.8+2.68
Jun. 3 40.0 24.0 +16.0+2.21
Jun. 4 42.5 25.8 +16.8+2.27
Jun. 19 52.5 35.8 +16.8+2.09
Jun. 25 70.0 43.5 +26.5+3.21
Jun. 26 62.5 42.3 +20.3+2.46
Jun. 27 60.0 42.8 +17.3+2.09
Jul. 17 62.5 43.5 +19.0+2.30
Aug. 28 52.5 36.3 +16.3+2.02
Sep. 3 52.5 35.3 +17.3+2.16
Sep. 25 52.5 34.5 +18.0+2.26
Oct. 1 45.0 29.0 +16.0+2.10
Oct. 8 42.5 27.0 +15.5+2.07
Oct. 14 42.5 22.0 +20.5+2.90

Days when it tends not to rain or snow
Date Precipitation ratio
of the day
[%]		 Precipitation ratio
before and after 10 days
[%]		 Difference of
precipitation ratio
[%]		 Statistic Z
Jan. 11 5.0 17.3 -12.3-2.01
Jan. 27 2.5 20.8 -18.3-2.80
Apr. 3 12.5 28.0 -15.5-2.12
May 6 12.5 29.5 -17.0-2.28
May 10 10.0 28.8 -18.8-2.55
Jun. 8 17.5 33.5 -16.0-2.07
Jun. 15 15.0 39.8 -24.8-3.08
Jun. 22 27.5 48.8 -21.3-2.57
Jun. 23 27.5 49.8 -22.3-2.69
Jul. 24 10.0 32.0 -22.0-2.89
Sep. 2 22.5 40.3 -17.8-2.20
Oct. 16 7.5 24.5 -17.0-2.44
Oct. 18 10.0 23.8 -13.8-1.99
Nov. 4 5.0 20.8 -15.8-2.41
Nov. 15 10.0 23.8 -13.8-1.99
Dec. 21 2.5 15.8 -13.3-2.27
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