August
August · July · June
United States · 1991–2020
August leads for comfortable weather in Cary: typically 24.8°C by day, 11.2°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.
August · July · June
July · August · June
September · June · August
The weakest month is January, scoring 5 against August’s 78 — days reach only -4.9°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 | -4.9°C | -16.3°C | 67 mm | 8 | 9 h 01 | 5 | Strong coverage |
| February | -3.2°C | -16°C | 50 mm | 7 | 10 h 16 | 5 | Strong coverage |
| March | 2.2°C | -9.5°C | 69 mm | 8.6 | 11 h 45 | 5 | Strong coverage |
| April | 9.6°C | -2.3°C | 74 mm | 9.9 | 13 h 28 | 10 | Strong coverage |
| May | 17.6°C | 3.8°C | 88 mm | 11.1 | 14 h 55 | 44 | Strong coverage |
| June | 22.5°C | 8.9°C | 102 mm | 10.9 | 15 h 44 | 68 | Strong coverage |
| July | 25.6°C | 12.3°C | 92 mm | 10.3 | 15 h 24 | 75 | Strong coverage |
| August | 24.8°C | 11.2°C | 89 mm | 8.7 | 14 h 09 | 78 | Strong coverage |
| September | 20.2°C | 6.7°C | 86 mm | 8.1 | 12 h 29 | 61 | Strong coverage |
| October | 12.5°C | 1.1°C | 103 mm | 9.5 | 10 h 50 | 22 | Strong coverage |
| November | 5.2°C | -4°C | 90 mm | 9 | 9 h 23 | 5 | Strong coverage |
| December | -1.4°C | -11°C | 85 mm | 9.9 | 8 h 40 | 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 | 14.4°C14 Jan 2005 | -40.6°C4 Jan 1981 | 59 mm30 Jan 1990 | 152 mm1979 · driest 6 mm in 2001 | 76 |
| February | 16.7°C20 Feb 1994 | -37.8°C21 Feb 1993 | 42 mm3 Feb 1968 | 148 mm1955 · driest 5 mm in 2026 | 76 |
| March | 26.1°C22 Mar 2012 | -35.0°C2 Mar 2001 | 56 mm17 Mar 2007 | 144 mm2024 · driest 11 mm in 1965 | 76 |
| April | 30.0°C27 Apr 1990 | -24.9°C6 Apr 2015 | 54 mm28 Apr 1973 | 156 mm1993 · driest 11 mm in 1967 | 76 |
| May | 35.6°C29 May 1978 | -7.8°C1 May 1977 | 89 mm27 May 1961 | 181 mm1961 · driest 11 mm in 1982 | 75 |
| June | 36.1°C13 Jun 1969 | -3.2°C2 Jun 2020 | 74 mm23 Jun 2012 | 292 mm2012 · driest 30 mm in 1983 | 76 |
| July | 36.1°C20 Jul 1991 | 0.0°C7 Jul 1969 | 68 mm5 Jul 2014 | 201 mm1996 · driest 15 mm in 2012 | 76 |
| August | 37.2°C2 Aug 1975 | -1.1°C25 Aug 1978 | 86 mm11 Aug 1990 | 248 mm1963 · driest 12 mm in 1975 | 75 |
| September | 33.9°C1 Sep 2010 | -6.7°C29 Sep 1980 | 132 mm11 Sep 1954 | 259 mm2015 · driest 13 mm in 2020 | 75 |
| October | 28.9°C6 Oct 2025 | -12.2°C30 Oct 1978 | 64 mm25 Oct 1959 | 201 mm2003 · driest 29 mm in 1997 | 75 |
| November | 22.8°C10 Nov 2020 | -25.6°C24 Nov 1989 | 70 mm26 Nov 1974 | 262 mm1950 · driest 41 mm in 1955 | 75 |
| December | 15.6°C1 Dec 2020 | -36.7°C30 Dec 1989 | 73 mm11 Dec 1993 | 197 mm1950 · driest 21 mm in 1958 | 76 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | 2 | 10 |
| February | 0 | 0 | 28 | 2 | 8 |
| March | <1 | 0 | 29 | 2 | 8 |
| April | <1 | 0 | 22 | 2 | 3 |
| May | 3 | <1 | 8 | 3 | 0 |
| June | 10 | 2 | <1 | 4 | 0 |
| July | 20 | 4 | 0 | 3 | 0 |
| August | 16 | 3 | 0 | 3 | 0 |
| September | 5 | <1 | 4 | 3 | <1 |
| October | <1 | 0 | 16 | 4 | <1 |
| November | 0 | 0 | 24 | 3 | 3 |
| December | 0 | 0 | 30 | 3 | 8 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 29% | 7% | 34% | -8.1–-2.2°C |
| February | 0% | 28% | 6% | 34% | -6.0–-0.7°C |
| March | <1% | 29% | 7% | 34% | -0.2–4.6°C |
| April | 4% | 32% | 8% | 39% | 7.8–11.2°C |
| May | 29% | 34% | 9% | 44% | 14.9–20.0°C |
| June | 54% | 34% | 10% | 44% | 20.9–24.3°C |
| July | 66% | 32% | 10% | 39% | 23.7–27.4°C |
| August | 66% | 29% | 10% | 31% | 22.6–26.2°C |
| September | 38% | 27% | 9% | 30% | 17.5–21.5°C |
| October | 8% | 29% | 11% | 35% | 10.3–15.2°C |
| November | <1% | 33% | 12% | 42% | 2.6–7.4°C |
| December | 0% | 33% | 9% | 42% | -4.8–1.0°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