Weather Records by Month: Japan
Record highs in Japan were most often set in July and record lows in July, with the count by month and record type for all years and for 1996 to 2025.
Data as of . Last revised (2026-10-17).
Key Facts
- July had the most record highs in Japan in all years: 15,261 of 116,191 (13.1%).
- July had the most record lows in Japan in all years: 4,511 of 45,924 (9.8%).
- July had the most record highs in Japan in 1996 to 2025: 10,305 of 77,533 (13.3%).
- April had the most record lows in Japan in 1996 to 2025: 2,073 of 18,501 (11.2%).
- Counts are daily maximum and daily minimum temperature records combined, and are not adjusted for the different lengths of the months.
All Years
Records by month and type| Record type | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record high maximum temperature | 3,857 | 3,773 | 5,947 | 4,760 | 6,021 | 6,086 | 7,398 | 7,104 | 6,498 | 5,412 | 4,403 | 3,355 | 64,614 |
| Record low maximum temperature | 2,122 | 2,227 | 1,844 | 2,480 | 2,489 | 2,049 | 2,544 | 2,475 | 2,102 | 2,381 | 2,446 | 2,879 | 28,038 |
| Record high minimum temperature | 2,805 | 2,623 | 3,600 | 2,969 | 4,348 | 5,203 | 7,863 | 7,072 | 5,482 | 4,342 | 2,818 | 2,452 | 51,577 |
| Record low minimum temperature | 1,434 | 1,442 | 1,100 | 1,584 | 1,648 | 1,762 | 1,967 | 1,479 | 1,170 | 1,365 | 1,392 | 1,543 | 17,886 |
Latest 30 Years
1996 to 2025| Record type | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record high maximum temperature | 2,066 | 2,732 | 4,841 | 3,335 | 4,200 | 4,090 | 5,060 | 4,467 | 5,018 | 4,175 | 3,101 | 1,719 | 44,804 |
| Record low maximum temperature | 942 | 806 | 778 | 1,353 | 1,082 | 694 | 878 | 1,204 | 823 | 1,044 | 1,158 | 1,456 | 12,218 |
| Record high minimum temperature | 1,177 | 1,324 | 2,342 | 1,863 | 2,574 | 3,578 | 5,245 | 4,399 | 4,183 | 3,169 | 1,506 | 1,369 | 32,729 |
| Record low minimum temperature | 595 | 453 | 415 | 720 | 583 | 432 | 618 | 624 | 354 | 311 | 565 | 613 | 6,283 |
Highs and Lows by Month
| Month | Highs, all years | Lows, all years | Highs, 1996 to 2025 | Lows, 1996 to 2025 |
|---|---|---|---|---|
| January | 6,662 | 3,556 | 3,243 | 1,537 |
| February | 6,396 | 3,669 | 4,056 | 1,259 |
| March | 9,547 | 2,944 | 7,183 | 1,193 |
| April | 7,729 | 4,064 | 5,198 | 2,073 |
| May | 10,369 | 4,137 | 6,774 | 1,665 |
| June | 11,289 | 3,811 | 7,668 | 1,126 |
| July | 15,261 | 4,511 | 10,305 | 1,496 |
| August | 14,176 | 3,954 | 8,866 | 1,828 |
| September | 11,980 | 3,272 | 9,201 | 1,177 |
| October | 9,754 | 3,746 | 7,344 | 1,355 |
| November | 7,221 | 3,838 | 4,607 | 1,723 |
| December | 5,807 | 4,422 | 3,088 | 2,069 |
What the Counts Mean
Each count is a daily temperature record in that calendar month: a daily maximum or daily minimum that went past the earlier record at that station for the same day of the year. Record highs combine the daily maximum and the daily minimum.
Months differ in length, so a month with more days has more chances for a record. The counts are not adjusted for that. The latest 30 years are 1996 to 2025. The two spans come from different numbers of stations and years, so compare the shape across months and not the totals.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17. Records are computed by this site from daily maximum and minimum temperature.