May
May · September · August
United States · 1991–2020
May leads for comfortable weather in Napi Headquarters: typically 24.5°C by day, 7.3°C at night, with 15 mm of rain. Based on measured 1991–2020 NOAA station history.
May · September · August
August · July · June
October · April · May
The weakest month is January, scoring 5 against May’s 85 — days reach only 5.5°C, 18° below the 24°C the score treats as ideal, and nights drop to -6.8°C.
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 | 5.5°C | -6.8°C | 13 mm | 3.4 | 9 h 54 | 5 | Strong coverage |
| February | 9.4°C | -4.2°C | 13 mm | 3.4 | 10 h 47 | 17 | Strong coverage |
| March | 14.8°C | -0.9°C | 15 mm | 3.3 | 11 h 51 | 41 | Strong coverage |
| April | 19°C | 2.4°C | 16 mm | 2.8 | 13 h 05 | 61 | Strong coverage |
| May | 24.5°C | 7.3°C | 15 mm | 2.8 | 14 h 06 | 85 | Strong coverage |
| June | 30.7°C | 12.3°C | 6 mm | 1.7 | 14 h 39 | 73 | Strong coverage |
| July | 32.9°C | 16°C | 19 mm | 4.4 | 14 h 26 | 68 | Strong coverage |
| August | 31.2°C | 15.2°C | 25 mm | 4.2 | 13 h 33 | 75 | Strong coverage |
| September | 27.2°C | 11°C | 28 mm | 4.2 | 12 h 22 | 81 | Strong coverage |
| October | 20.2°C | 4.1°C | 21 mm | 4 | 11 h 11 | 67 | Strong coverage |
| November | 12.4°C | -2.1°C | 14 mm | 3.1 | 10 h 10 | 31 | Strong coverage |
| December | 5.8°C | -6.5°C | 14 mm | 3.6 | 9 h 40 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.9°C17 Jan 2000 | -22.2°C30 Jan 1979 | 24 mm28 Jan 1989 | 52 mm1993 · driest 0 mm in 1981 | 47 |
| February | 25.0°C5 Feb 2025 | -25.6°C7 Feb 1989 | 21 mm26 Feb 1987 | 46 mm2005 · driest 1 mm in 2002 | 48 |
| March | 32.8°C26 Mar 2026 | -16.1°C3 Mar 2002 | 29 mm24 Mar 2007 | 52 mm2000 · driest 0 mm in 2004 | 47 |
| April | 30.0°C30 Apr 1992 | -9.4°C5 Apr 2023 | 32 mm4 Apr 1997 | 73 mm1997 · driest 0 mm in 1987 | 48 |
| May | 36.1°C30 May 2000 | -5.0°C3 May 2008 | 30 mm10 May 1992 | 49 mm2019 · driest 0 mm in 2024 | 48 |
| June | 38.3°C21 Jun 2016 | 0.0°C5 Jun 1999 | 23 mm27 Jun 2022 | 46 mm2015 · driest 0 mm in 2012 | 49 |
| July | 39.4°C16 Jul 2003 | 6.1°C1 Jul 2020 | 24 mm30 Jul 2017 | 104 mm1986 · driest 0 mm in 2025 | 49 |
| August | 37.2°C1 Aug 2002 | 5.0°C21 Aug 1980 | 30 mm1 Aug 1989 | 90 mm1982 · driest 1 mm in 2020 | 48 |
| September | 36.7°C6 Sep 2022 | -2.2°C29 Sep 1999 | 40 mm9 Sep 2002 | 84 mm2013 · driest 2 mm in 1979 | 48 |
| October | 32.2°C1 Oct 2024 | -15.0°C31 Oct 2019 | 30 mm21 Oct 1979 | 56 mm1996 · driest 0 mm in 1999 | 47 |
| November | 26.1°C7 Nov 2023 | -15.6°C30 Nov 2006 | 20 mm3 Nov 1978 | 70 mm1986 · driest 0 mm in 1989 | 48 |
| December | 20.0°C26 Dec 2025 | -26.7°C24 Dec 1990 | 13 mm31 Dec 2018 | 36 mm2018 · driest 0 mm in 2017 | 48 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 | 2 |
| February | 0 | 0 | 24 | <1 | 2 |
| March | <1 | 0 | 19 | <1 | <1 |
| April | 4 | 0 | 9 | <1 | <1 |
| May | 17 | 3 | 1 | <1 | 0 |
| June | 28 | 20 | 0 | <1 | 0 |
| July | 30 | 28 | 0 | <1 | 0 |
| August | 30 | 23 | 0 | <1 | 0 |
| September | 24 | 8 | <1 | <1 | 0 |
| October | 6 | <1 | 6 | <1 | <1 |
| November | 0 | 0 | 21 | <1 | <1 |
| December | 0 | 0 | 29 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 11% | <1% | 6% | 1.6–8.3°C |
| February | 1% | 12% | <1% | 9% | 6.4–11.8°C |
| March | 17% | 13% | <1% | 11% | 11.7–17.3°C |
| April | 51% | 9% | 1% | 5% | 17.2–21.6°C |
| May | 79% | 9% | <1% | 5% | 21.9–27.2°C |
| June | 94% | 6% | <1% | 4% | 28.8–32.6°C |
| July | 86% | 14% | 2% | 13% | 31.7–34.5°C |
| August | 86% | 14% | 3% | 10% | 29.6–32.8°C |
| September | 84% | 13% | 3% | 10% | 25.7–29.3°C |
| October | 54% | 13% | 2% | 9% | 18.2–22.7°C |
| November | 8% | 11% | 2% | 5% | 10.0–14.9°C |
| December | <1% | 11% | <1% | 5% | 3.2–8.2°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