October
October · May · November
Japan · 1991–2020
October leads for comfortable weather in Ichinomiya: typically 23.7°C by day, 14.2°C at night, with 184 mm of rain. Based on measured 1991–2020 NOAA station history.
October · May · November
September · June · August
November · April · October
The weakest month is July, scoring 8 against October’s 71 — 325 mm of rain falls, and days average 31.7°C, 8° above the 24°C the score treats as ideal.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 9.1°C | 0°C | 72 mm | 8.6 | 10 h 01 | 14 | Good coverage |
| February | 10.4°C | 0.5°C | 86 mm | 7.7 | 10 h 51 | 18 | Good coverage |
| March | 14.4°C | 3.5°C | 129 mm | 9.1 | 11 h 52 | 29 | Good coverage |
| April | 20°C | 8.7°C | 177 mm | 9.3 | 13 h 02 | 50 | Good coverage |
| May | 25°C | 14°C | 195 mm | 9.1 | 14 h | 67 | Good coverage |
| June | 28.1°C | 18.8°C | 244 mm | 11.8 | 14 h 31 | 43 | Good coverage |
| July | 31.7°C | 23.3°C | 325 mm | 15.2 | 14 h 19 | 8 | Good coverage |
| August | 33.5°C | 24.5°C | 192 mm | 11.1 | 13 h 29 | 22 | Good coverage |
| September | 29.3°C | 20.3°C | 244 mm | 11.5 | 12 h 21 | 36 | Good coverage |
| October | 23.7°C | 14.2°C | 184 mm | 9.3 | 11 h 14 | 71 | Good coverage |
| November | 17.6°C | 7.7°C | 89 mm | 7.2 | 10 h 15 | 54 | Good coverage |
| December | 11.7°C | 2.3°C | 84 mm | 7.8 | 9 h 47 | 25 | Good coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.4°C27 Jan 1969 | -9.0°C31 Jan 1954 | 57 mm31 Jan 2009 | 158 mm1973 · driest 0 mm in 2026 | 73 |
| February | 21.4°C11 Feb 1962 | -6.7°C9 Feb 1953 | 88 mm27 Feb 2010 | 199 mm1959 · driest 0 mm in 2026 | 73 |
| March | 25.8°C30 Mar 1998 | -5.2°C6 Mar 1977 | 101 mm25 Mar 1981 | 250 mm1977 · driest 18 mm in 1973 | 74 |
| April | 30.8°C29 Apr 1998 | -0.8°C6 Apr 1965 | 125 mm25 Apr 2018 | 325 mm1974 · driest 0 mm in 2025 | 74 |
| May | 33.7°C27 May 2015 | 4.3°C1 May 1965 | 159 mm27 May 1965 | 350 mm2011 · driest 0 mm in 2025 | 73 |
| June | 38.2°C30 Jun 2022 | 10.1°C4 Jun 1957 | 260 mm26 Jun 1961 | 789 mm1961 · driest 0 mm in 2025 | 73 |
| July | 39.6°C18 Jul 2018 | 14.5°C4 Jul 1966 | 243 mm25 Jul 1974 | 650 mm1974 · driest 0 mm in 2025 | 74 |
| August | 39.8°C16 Aug 2007 | 14.0°C20 Aug 1956 | 226 mm17 Aug 1977 | 434 mm2021 · driest 0 mm in 2025 | 72 |
| September | 37.7°C4 Sep 2010 | 9.5°C30 Sep 1966 | 219 mm8 Sep 1976 | 915 mm1976 · driest 0 mm in 2025 | 72 |
| October | 32.4°C1 Oct 2019 | 3.4°C31 Oct 1983 | 143 mm11 Oct 1962 | 341 mm2004 · driest 0 mm in 2025 | 73 |
| November | 26.1°C3 Nov 2023 | -2.3°C29 Nov 1953 | 80 mm11 Nov 2009 | 205 mm2003 · driest 0 mm in 2025 | 73 |
| December | 21.9°C11 Dec 2015 | -5.6°C31 Dec 1967 | 89 mm11 Dec 2015 | 135 mm2015 · driest 0 mm in 2025 | 73 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 10 | 2 |
| February | 0 | 0 | 8 | 2 |
| March | <1 | 0 | 2 | 4 |
| April | 3 | 0 | 0 | 4 |
| May | 15 | 2 | 0 | 5 |
| June | 23 | 7 | 0 | 6 |
| July | 28 | 20 | 0 | 6 |
| August | 30 | 26 | 0 | 4 |
| September | 25 | 13 | 0 | 5 |
| October | 11 | <1 | 0 | 4 |
| November | <1 | 0 | 0 | 2 |
| December | 0 | 0 | 3 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 27% | 8% | 26% | 7.1–10.5°C |
| February | <1% | 29% | 10% | 30% | 7.8–12.0°C |
| March | 4% | 32% | 16% | 34% | 12.5–15.6°C |
| April | 35% | 37% | 21% | 48% | 18.1–21.3°C |
| May | 61% | 37% | 20% | 43% | 22.9–25.9°C |
| June | 58% | 43% | 25% | 59% | 25.9–28.9°C |
| July | 56% | 45% | 25% | 53% | 28.8–33.6°C |
| August | 67% | 34% | 16% | 41% | 31.1–35.0°C |
| September | 59% | 41% | 22% | 53% | 26.7–30.5°C |
| October | 62% | 30% | 15% | 29% | 21.7–24.7°C |
| November | 20% | 25% | 10% | 24% | 16.0–18.8°C |
| December | <1% | 25% | 8% | 22% | 9.9–13.1°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page