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Home > Weather and Earthquakes > One-week Forecasts

One-week Forecasts: Tokyo

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Prefecture

Updated at 11:00 JST, 31 October 2014

Date 1
Sat
2
Sun
3
Mon
4
Tue
5
Wed
6
Thu
7
Fri
Tokyo

CLOUDY, FREQUENT SCATTERED SHOWERS LATER CLOUDY MOSTLY CLOUDY PARTLY CLOUDY PARTLY CLOUDY CLOUDY CLOUDY, OCCASIONAL SCATTERED SHOWERS
Probability of
Precipitation (%)
30/40/60/50 40 30 20 20 40 50
Reliability / / C A A C C
Tokyo High (°C) 20
24
(23 - 26)
22
(19 - 24)
18
(17 - 21)
20
(18 - 22)
21
(19 - 23)
20
(16 - 24)
Low (°C) 16
18
(15 - 19)
17
(14 - 19)
12
(10 - 13)
11
(9 - 12)
12
(10 - 14)
14
(12 - 17)
Izu

CLOUDY, RAIN LATER CLOUDY, OCCASIONAL SCATTERED SHOWERS CLOUDY, OCCASIONAL SCATTERED SHOWERS MOSTLY CLOUDY MOSTLY CLOUDY CLOUDY CLOUDY, OCCASIONAL SCATTERED SHOWERS
Probability of
Precipitation (%)
20/40/70/60 50 60 30 30 40 50
Reliability / / B A A C C
Hachijojima High (°C) 23
24
(22 - 25)
22
(20 - 24)
21
(19 - 22)
22
(20 - 23)
23
(21 - 24)
23
(21 - 25)
Low (°C) 19
19
(17 - 20)
15
(13 - 18)
15
(12 - 17)
15
(14 - 18)
17
(15 - 19)
17
(15 - 20)
Ogasawara

MOSTLY CLOUDY MOSTLY CLOUDY CLOUDY CLOUDY, OCCASIONAL SCATTERED SHOWERS CLOUDY MOSTLY CLOUDY MOSTLY CLOUDY
Probability of
Precipitation (%)
30/20/20/20 30 40 50 40 30 30
Reliability / / C C C C B
Chichijima High (°C) 28
28
(27 - 29)
28
(27 - 29)
27
(25 - 28)
27
(26 - 29)
28
(27 - 30)
28
(27 - 29)
Low (°C) 24
23
(22 - 25)
24
(22 - 25)
23
(21 - 24)
23
(22 - 25)
24
(22 - 25)
24
(22 - 25)
Normal Precipitation Low High
Tokyo 4 - 28mm 12.1 °C 19.0 °C
Hachijojima 28 - 66mm 15.5 °C 21.4 °C
Chichijima 7 - 31mm 22.5 °C 26.7 °C

One-week forecasts for individual prefectures are issued at 11:00 and 17:00 JST every day. The latest daily forecasts are displayed in the columns for the first and second days. The probability of precipitation for today and tomorrow is displayed with six hours as a unit (i.e., 00 – 06/06 – 12/12 – 18/18 – 24 JST).
Figures shown in parentheses in the low and high temperature rows indicate the ranges of error in degrees Celsius. The reliability for the day is represented as A, B or C in descending order of expected accuracy. The results of precipitation forecast accuracy verification for the period from 1 April 2002 to 31 March 2007 indicate an average accuracy of 86% for A, 72% for B and 56% for C.
Values in the normal precipitation column represent the range of normal cumulative precipitation amounts for the coming seven days, while the figures in the normal low/high temperature columns represent those for the fourth day of the period.