May
Other strong months: October and April
Japan · 1991–2020
For Kiryū, May has the most comfortable weather in our climate comparison. Typical daytime highs are 24.5°C, nights average 13.2°C, and rainfall totals about 100 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.
Other strong months: October and April
Other strong months: November and May
Make the answer personal
Set the daytime temperature and rainfall you are comfortable with. We will show only the months that meet every choice, using the measured 1991–2020 averages below.
2 months fit your choices for Kiryū
August has the lowest comfort score at 21 out of 100, compared with May at 80. The main reason is that 245 mm of rain falls, and days average 31.7°C, 8° above the 24°C the score treats as ideal.
Quick answers
These answers come from the same measured monthly climate record shown on this page.
May is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 24.5°C and 100 mm of rain.
August is hottest in this record, with a typical daytime high of 31.7°C and a night-time low of 22.7°C.
January has the lowest monthly rainfall total at 22 mm.
No. These are long-term measured averages from 1991–2020. Check a current forecast before you travel.
Month by month
The bars combine daytime temperature, night-time temperature and rainfall. The figures are measured historical averages, not a forecast for a particular trip.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 9.2°C | -1.1°C | 22 mm | 2 | 9 h 56 | 22 | Good coverage |
| February | 10.2°C | -0.5°C | 29 mm | 4 | 10 h 48 | 26 | Good coverage |
| March | 13.8°C | 2.6°C | 56 mm | 6.5 | 11 h 51 | 38 | Good coverage |
| April | 19.5°C | 7.9°C | 83 mm | 8.1 | 13 h 04 | 61 | Good coverage |
| May | 24.5°C | 13.2°C | 100 mm | 9.9 | 14 h 05 | 80 | Good coverage |
| June | 27°C | 17.6°C | 188 mm | 14.4 | 14 h 38 | 54 | Good coverage |
| July | 30.8°C | 21.8°C | 236 mm | 17 | 14 h 25 | 25 | Good coverage |
| August | 31.7°C | 22.7°C | 245 mm | 14.2 | 13 h 33 | 21 | Good coverage |
| September | 27.5°C | 18.8°C | 266 mm | 15.2 | 12 h 22 | 38 | Good coverage |
| October | 22°C | 12.5°C | 173 mm | 8.7 | 11 h 12 | 65 | Good coverage |
| November | 16.5°C | 6.4°C | 52 mm | 5.9 | 10 h 11 | 55 | Good coverage |
| December | 11.7°C | 1.4°C | 30 mm | 3.7 | 9 h 41 | 34 | Good coverage |
What has changed
Each bar shows the difference between the 2011–2025 average daytime high and the 1961–1990 average for the same month at the same station. A blank month does not have enough older observations for a reliable comparison.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.7°C27 Jan 1969 | -8.6°C25 Jan 1963 | 54 mm27 Jan 2002 | 102 mm2002 · driest 0 mm in 1982 | 75 |
| February | 24.4°C11 Feb 1962 | -9.0°C27 Feb 1981 | 110 mm15 Feb 2014 | 158 mm2014 · driest 0 mm in 1988 | 75 |
| March | 27.1°C30 Mar 1998 | -7.6°C1 Mar 1957 | 56 mm23 Mar 1986 | 119 mm2010 · driest 0 mm in 2026 | 75 |
| April | 32.1°C27 Apr 1983 | -3.0°C2 Apr 1965 | 58 mm18 Apr 2020 | 155 mm2008 · driest 0 mm in 2025 | 75 |
| May | 36.5°C13 May 1993 | 2.3°C3 May 1953 | 78 mm26 May 1989 | 255 mm1965 · driest 0 mm in 2025 | 75 |
| June | 39.5°C25 Jun 2022 | 7.6°C1 Jun 1978 | 146 mm28 Jun 1966 | 302 mm1966 · driest 0 mm in 2025 | 75 |
| July | 40.0°C24 Jul 2001 | 11.6°C19 Jul 2026 | 127 mm24 Jul 2019 | 376 mm2006 · driest 0 mm in 2025 | 75 |
| August | 40.6°C5 Aug 2025 | 13.6°C20 Aug 1956 | 340 mm23 Aug 1993 | 574 mm1999 · driest 0 mm in 2025 | 74 |
| September | 38.1°C3 Sep 1984 | 7.5°C28 Sep 1995 | 180 mm12 Sep 1993 | 492 mm2011 · driest 0 mm in 2025 | 74 |
| October | 31.9°C1 Oct 2012 | 3.1°C19 Oct 1957 | 212 mm12 Oct 2019 | 437 mm2019 · driest 0 mm in 2025 | 74 |
| November | 25.9°C5 Nov 1965 | -2.1°C27 Nov 1966 | 89 mm30 Nov 1990 | 191 mm1990 · driest 0 mm in 1998 | 74 |
| December | 25.2°C5 Dec 2004 | -6.6°C31 Dec 1967 | 98 mm27 Dec 2006 | 115 mm2006 · driest 0 mm in 1988 | 74 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 12 | <1 |
| February | 0 | 0 | 11 | <1 |
| March | <1 | 0 | 4 | 2 |
| April | 3 | <1 | <1 | 2 |
| May | 14 | 2 | 0 | 3 |
| June | 20 | 6 | 0 | 5 |
| July | 25 | 18 | 0 | 6 |
| August | 28 | 21 | 0 | 5 |
| September | 20 | 8 | 0 | 5 |
| October | 5 | <1 | 0 | 3 |
| November | <1 | 0 | <1 | 2 |
| December | 0 | 0 | 6 | <1 |
| Month | Dry days reaching 20°C | Wet days | Days with heavy rain | Weeks with 3+ wet days | Typical high by year |
|---|---|---|---|---|---|
| January | <1% | 9% | 3% | 3% | 7.3–10.2°C |
| February | <1% | 17% | 4% | 12% | 7.7–11.5°C |
| March | 4% | 24% | 7% | 21% | 11.1–14.7°C |
| April | 29% | 30% | 10% | 32% | 17.1–20.6°C |
| May | 58% | 35% | 12% | 43% | 21.7–25.3°C |
| June | 53% | 46% | 19% | 63% | 23.9–28.2°C |
| July | 52% | 49% | 20% | 63% | 26.8–32.5°C |
| August | 60% | 40% | 18% | 52% | 29.4–33.7°C |
| September | 55% | 45% | 20% | 57% | 24.6–28.8°C |
| October | 48% | 30% | 13% | 28% | 20.0–22.8°C |
| November | 12% | 18% | 6% | 12% | 14.9–17.5°C |
| December | <1% | 11% | 2% | 4% | 9.8–12.7°C |
A dry day reaching 20°C records under 1 mm of rain. A wet day records at least 1 mm, while a heavy-rain day records at least 10 mm. The weekly figure is the share of seven-day periods containing three or more wet days. The final column shows the middle 80% of average daytime highs recorded for that month in individual years; a wider range means conditions have varied more from one year to another.
The evidence behind this page
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The weather comparison for Kiryū is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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