May
May · October · April
79climate match
United States · 1991–2020
Best time to visit
Hartwell.
May leads for comfortable weather in Hartwell: typically 26°C by day, 14.9°C at night, with 102 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high26°C
Typical low14.9°C
Rain in May102 mm
August
August · July · June
77climate match
April
April · October · March
77climate match
The weakest month is January, scoring 14 against May’s 79 — days reach only 11.2°C, 13° below the 24°C the score treats as ideal, and nights drop to 0.5°C.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
1411.2° / 0.5°
Feb
2613.4° / 1.8°
Mar
4617.7° / 5.4°
Apr
7222.3° / 9.7°
May
7926° / 14.9°
Jun
5529.7° / 19.3°
Jul
4831.5° / 21.2°
Aug
5430.5° / 20.8°
Sep
6927.5° / 17.7°
Oct
7421.9° / 11.3°
Nov
4516.7° / 5.2°
Dec
2112.5° / 2.1°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 11.2°C | 0.5°C | 120 mm | 8.8 | 10 h 05 | 14 | Strong coverage |
| February | 13.4°C | 1.8°C | 114 mm | 8 | 10 h 54 | 26 | Strong coverage |
| March | 17.7°C | 5.4°C | 117 mm | 8.5 | 11 h 52 | 46 | Strong coverage |
| April | 22.3°C | 9.7°C | 94 mm | 7.5 | 13 h | 72 | Strong coverage |
| May | 26°C | 14.9°C | 102 mm | 7.9 | 13 h 56 | 79 | Strong coverage |
| June | 29.7°C | 19.3°C | 125 mm | 9.8 | 14 h 26 | 55 | Strong coverage |
| July | 31.5°C | 21.2°C | 115 mm | 8.5 | 14 h 14 | 48 | Strong coverage |
| August | 30.5°C | 20.8°C | 105 mm | 8.4 | 13 h 26 | 54 | Strong coverage |
| September | 27.5°C | 17.7°C | 115 mm | 6.5 | 12 h 21 | 69 | Strong coverage |
| October | 21.9°C | 11.3°C | 101 mm | 6.3 | 11 h 16 | 74 | Strong coverage |
| November | 16.7°C | 5.2°C | 101 mm | 7.5 | 10 h 19 | 45 | Strong coverage |
| December | 12.5°C | 2.1°C | 125 mm | 8.8 | 9 h 52 | 21 | Strong coverage |
What has changed
Hartwell runs -0.9°C
on the 1961–1990 baseline.
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.
Jan
-0.5
Feb
0.0
Mar
-1.2
Apr
-1.8
May
-1.5
Jun
-0.7
Jul
-0.5
Aug
-1.2
Sep
-0.7
Oct
-0.8
Nov
-1.9
Dec
-0.4
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 26.7°C30 Jan 1975 | -20.6°C26 Jan 1940 | 112 mm18 Jan 1943 | 292 mm1936 · driest 6 mm in 1968 | 113 |
| February | 27.8°C4 Feb 1927 | -15.6°C17 Feb 1958 | 92 mm7 Feb 2020 | 345 mm1990 · driest 6 mm in 1989 | 116 |
| March | 32.8°C26 Mar 1929 | -12.2°C5 Mar 1960 | 127 mm15 Mar 1990 | 347 mm1973 · driest 31 mm in 2004 | 117 |
| April | 35.6°C24 Apr 1925 | -3.9°C7 Apr 1950 | 92 mm13 Apr 1979 | 289 mm1998 · driest 9 mm in 1915 | 117 |
| May | 38.9°C27 May 1926 | 1.1°C4 May 1940 | 83 mm7 May 2026 | 324 mm1991 · driest 3 mm in 1936 | 115 |
| June | 41.1°C28 Jun 1952 | 7.2°C1 Jun 1972 | 143 mm4 Jun 1967 | 291 mm1994 · driest 2 mm in 2016 | 116 |
| July | 42.8°C29 Jul 1952 | 10.6°C13 Jul 1918 | 152 mm19 Jul 1964 | 425 mm2013 · driest 3 mm in 1993 | 115 |
| August | 42.2°C22 Aug 1983 | 11.7°C29 Aug 1922 | 183 mm16 Aug 1994 | 374 mm1908 · driest 3 mm in 1968 | 112 |
| September | 42.8°C4 Sep 1925 | 3.9°C30 Sep 1967 | 165 mm8 Sep 2014 | 457 mm2004 · driest 0 mm in 1954 | 112 |
| October | 37.8°C5 Oct 1954 | -3.3°C31 Oct 1954 | 124 mm4 Oct 2015 | 273 mm1932 · driest 0 mm in 2000 | 115 |
| November | 30.0°C17 Nov 1964 | -13.9°C25 Nov 1950 | 131 mm11 Nov 2009 | 373 mm1948 · driest 7 mm in 1950 | 112 |
| December | 27.8°C11 Dec 1923 | -16.1°C25 Dec 1983 | 115 mm16 Dec 1992 | 307 mm1931 · driest 6 mm in 1979 | 114 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 15 | 4 | <1 |
| February | <1 | 0 | 11 | 4 | <1 |
| March | 3 | <1 | 5 | 4 | <1 |
| April | 10 | <1 | <1 | 3 | 0 |
| May | 21 | 5 | 0 | 3 | 0 |
| June | 27 | 16 | 0 | 4 | 0 |
| July | 30 | 22 | 0 | 3 | 0 |
| August | 29 | 19 | 0 | 3 | 0 |
| September | 23 | 9 | 0 | 3 | 0 |
| October | 8 | <1 | <1 | 3 | 0 |
| November | <1 | 0 | 4 | 3 | 0 |
| December | 0 | 0 | 12 | 4 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 7% | 27% | 13% | 29% | 9.1–14.8°C |
| February | 14% | 29% | 15% | 32% | 11.4–17.3°C |
| March | 34% | 28% | 15% | 27% | 15.7–21.4°C |
| April | 65% | 23% | 11% | 23% | 21.1–25.9°C |
| May | 74% | 24% | 11% | 25% | 25.1–29.9°C |
| June | 74% | 26% | 11% | 27% | 28.9–33.4°C |
| July | 72% | 28% | 12% | 30% | 30.5–34.7°C |
| August | 75% | 25% | 11% | 26% | 29.7–33.7°C |
| September | 80% | 20% | 9% | 18% | 26.4–31.8°C |
| October | 70% | 17% | 8% | 14% | 21.1–26.0°C |
| November | 34% | 22% | 10% | 20% | 15.2–20.4°C |
| December | 9% | 26% | 13% | 28% | 10.2–16.3°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
Nearby, measured,
and named.
- Place identity
- GeoNames 4199572
- NOAA station
- USC00094133 · HARTWELL
- Station distance
- 0.2 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 25 usable years
- Daylight
- Calculated from latitude 34.35°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.