August
August · September · June
United States · 1991–2020
August leads for comfortable weather in Henderson: typically 26.7°C by day, 15.1°C at night, with 96 mm of rain. Based on measured 1991–2020 NOAA station history.
August · September · June
July · August · June
September · May · October
The weakest month is January, scoring 5 against August’s 79 — days reach only -5.1°C, 29° below 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 | -5.1°C | -15.2°C | 24 mm | 4 | 9 h 10 | 5 | Strong coverage |
| February | -2.4°C | -12.9°C | 25 mm | 3.7 | 10 h 22 | 5 | Strong coverage |
| March | 4.8°C | -5.7°C | 45 mm | 5 | 11 h 46 | 5 | Strong coverage |
| April | 13.2°C | 1.1°C | 73 mm | 7.4 | 13 h 24 | 30 | Strong coverage |
| May | 20.5°C | 8.2°C | 105 mm | 9.3 | 14 h 46 | 61 | Strong coverage |
| June | 25.8°C | 14.1°C | 125 mm | 9.3 | 15 h 32 | 74 | Strong coverage |
| July | 27.9°C | 16.4°C | 108 mm | 7.8 | 15 h 14 | 70 | Strong coverage |
| August | 26.7°C | 15.1°C | 96 mm | 7.1 | 14 h 02 | 79 | Strong coverage |
| September | 22.8°C | 9.9°C | 72 mm | 6.2 | 12 h 28 | 79 | Strong coverage |
| October | 15°C | 2.8°C | 57 mm | 6 | 10 h 54 | 42 | Strong coverage |
| November | 5.7°C | -4.2°C | 40 mm | 4.3 | 9 h 31 | 5 | Strong coverage |
| December | -1.7°C | -10.8°C | 27 mm | 4.5 | 8 h 51 | 5 | Strong 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 | 18.3°C25 Jan 1944 | -40.0°C12 Jan 1912 | 51 mm10 Jan 1995 | 86 mm1917 · driest 0 mm in 1961 | 130 |
| February | 20.0°C26 Feb 1896 | -37.8°C8 Feb 1895 | 51 mm29 Feb 2012 | 62 mm2019 · driest 0 mm in 2025 | 131 |
| March | 28.9°C23 Mar 1910 | -34.4°C11 Mar 1948 | 51 mm31 Mar 2005 | 136 mm1977 · driest 0 mm in 1909 | 132 |
| April | 34.4°C21 Apr 1980 | -20.6°C1 Apr 1924 | 106 mm18 Apr 2019 | 157 mm2001 · driest 1 mm in 1987 | 128 |
| May | 41.7°C31 May 1934 | -10.0°C5 May 1989 | 108 mm14 May 2023 | 230 mm1908 · driest 4 mm in 1934 | 128 |
| June | 40.0°C27 Jun 1934 | 0.0°C3 Jun 1945 | 118 mm29 Jun 2020 | 307 mm1908 · driest 17 mm in 2012 | 131 |
| July | 42.8°C14 Jul 1936 | 1.1°C12 Jul 1910 | 166 mm26 Jul 2020 | 242 mm1943 · driest 12 mm in 2014 | 130 |
| August | 40.0°C15 Aug 1936 | 1.1°C30 Aug 1931 | 219 mm7 Aug 1968 | 270 mm1968 · driest 0 mm in 1896 | 131 |
| September | 39.4°C10 Sep 1931 | -6.1°C30 Sep 1939 | 116 mm22 Sep 2016 | 243 mm1986 · driest 5 mm in 2024 | 132 |
| October | 33.3°C10 Oct 1928 | -15.6°C30 Oct 1925 | 79 mm17 Oct 1996 | 171 mm1911 · driest 0 mm in 1952 | 131 |
| November | 27.2°C9 Nov 2006 | -30.0°C30 Nov 1896 | 55 mm12 Nov 1940 | 112 mm1975 · driest 0 mm in 1904 | 129 |
| December | 20.6°C2 Dec 1998 | -35.6°C19 Dec 1983 | 42 mm12 Dec 1965 | 76 mm1982 · driest 0 mm in 1913 | 129 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 4 |
| February | 0 | 0 | 27 | <1 | 3 |
| March | <1 | 0 | 25 | 2 | 1 |
| April | 2 | <1 | 12 | 2 | <1 |
| May | 7 | 2 | 1 | 4 | 0 |
| June | 18 | 6 | 0 | 4 | 0 |
| July | 25 | 9 | 0 | 3 | 0 |
| August | 22 | 6 | 0 | 3 | 0 |
| September | 12 | 3 | <1 | 2 | 0 |
| October | 3 | <1 | 10 | 2 | <1 |
| November | <1 | 0 | 22 | 1 | 2 |
| December | 0 | 0 | 29 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 13% | 2% | 6% | -9.0–0.1°C |
| February | 0% | 12% | 2% | 5% | -5.8–2.3°C |
| March | 3% | 17% | 5% | 12% | 1.0–9.5°C |
| April | 20% | 23% | 7% | 24% | 10.7–18.2°C |
| May | 46% | 29% | 11% | 34% | 18.7–24.6°C |
| June | 65% | 30% | 13% | 34% | 24.0–28.9°C |
| July | 75% | 24% | 10% | 22% | 26.8–31.7°C |
| August | 75% | 24% | 11% | 23% | 25.5–30.6°C |
| September | 61% | 21% | 9% | 20% | 21.0–25.7°C |
| October | 29% | 17% | 6% | 13% | 13.0–19.9°C |
| November | 3% | 14% | 4% | 9% | 2.3–9.8°C |
| December | 0% | 13% | 2% | 7% | -5.4–2.0°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