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Home > Weather and Earthquakes > One-week Forecasts

One-week Forecasts: Tokyo

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Prefecture

Updated at 05:00 JST, 27 January 2015

Date 27
Tue
28
Wed
29
Thu
30
Fri
31
Sat
1
Sun
2
Mon
Tokyo

RAIN, CLOUDY LATER PARTLY CLOUDY CLEAR, CLOUDY LATER CLOUDY, OCCASIONAL SCATTERED SHOWERS OR SNOW FLURRIES CLOUDY CLEAR CLEAR
Probability of
Precipitation (%)
-/50/10/20 20/10/10/0 10 60 40 10 10
Reliability / / A B B A A
Tokyo High (°C) 16
8
7
(5 - 8)
4
(2 - 7)
8
(6 - 10)
7
(4 - 8)
7
(5 - 9)
Low (°C) / 3
-1
(-3 - 0)
1
(0 - 3)
1
(0 - 4)
0
(-3 - 1)
-1
(-3 - 0)
IzuHokubu

RAIN, CLEAR LATER CLOUDY, CLEAR LATER CLEAR, CLOUDY LATER CLOUDY, FREQUENT SCATTERED SHOWERS CLOUDY, OCCASIONAL SCATTERED SHOWERS PARTLY CLOUDY PARTLY CLOUDY
Probability of
Precipitation (%)
-/50/10/10 20/20/10/10 10 70 60 10 10
Reliability / / A A C A A
Oshima High (°C) 16
8
8
(7 - 10)
10
(8 - 12)
10
(8 - 12)
8
(6 - 10)
9
(7 - 10)
Low (°C) / 6
0
(-2 - 2)
3
(2 - 6)
2
(1 - 5)
1
(-2 - 2)
0
(-2 - 2)
IzuNambu

RAIN, CLOUDY LATER CLOUDY, PARTLY CLOUDY LATER CLEAR, CLOUDY LATER CLOUDY, FREQUENT SCATTERED SHOWERS CLOUDY, OCCASIONAL SCATTERED SHOWERS PARTLY CLOUDY PARTLY CLOUDY
Probability of
Precipitation (%)
-/50/10/20 20/20/20/20 20 80 70 10 10
Reliability / / B A C A A
Hachijojima High (°C) 15
11
10
(9 - 12)
15
(13 - 17)
11
(9 - 13)
8
(7 - 10)
9
(7 - 10)
Low (°C) / 9
5
(4 - 7)
7
(6 - 9)
5
(4 - 7)
4
(2 - 5)
4
(2 - 5)
Ogasawara

PARTLY CLOUDY CLOUDY PARTLY CLOUDY PARTLY CLOUDY PARTLY CLOUDY MOSTLY CLOUDY MOSTLY CLOUDY
Probability of
Precipitation (%)
-/0/0/10 20/10/40/20 20 10 10 20 20
Reliability / / A A A A A
Chichijima High (°C) 22
21
19
(18 - 20)
20
(19 - 21)
20
(19 - 21)
17
(16 - 18)
16
(15 - 17)
Low (°C) / 18
15
(13 - 18)
16
(14 - 17)
16
(14 - 19)
13
(11 - 15)
13
(11 - 14)
Normal Precipitation Low High
Tokyo 0 - 11mm 0.8 °C 9.4 °C
Oshima 5 - 26mm 3.0 °C 10.4 °C
Hachijojima 16 - 37mm 6.8 °C 12.3 °C
Chichijima 5 - 16mm 15.1 °C 19.9 °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.