August
August · June · September
79climate match
United States · 1991–2020
Best time to visit
Charlestown.
August leads for comfortable weather in Charlestown: typically 26.5°C by day, 15.3°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortAugust
Typical high26.5°C
Typical low15.3°C
Rain in August97 mm
July
July · August · June
66climate match
May
May · September · June
75climate match
The weakest month is January, scoring 5 against August’s 79 — days reach only 3°C, 21° below the 24°C the score treats as ideal.
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
53° / -7°
Feb
54.1° / -6.4°
Mar
57.9° / -2.7°
Apr
2513.6° / 2.3°
May
5618.8° / 7.6°
Jun
7823.5° / 12.4°
Jul
7627° / 16.3°
Aug
7926.5° / 15.3°
Sep
7823° / 11.4°
Oct
3916.8° / 5.5°
Nov
1511.3° / 0.2°
Dec
56° / -3.8°
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 3°C | -7°C | 103 mm | 9 | 5.9°C | 9 h 29 | 5 | Good coverage |
| February | 4.1°C | -6.4°C | 104 mm | 8.8 | 4.1°C | 10 h 33 | 5 | Good coverage |
| March | 7.9°C | -2.7°C | 137 mm | 9 | 4.2°C | 11 h 48 | 5 | Good coverage |
| April | 13.6°C | 2.3°C | 126 mm | 9.2 | 6.5°C | 13 h 16 | 25 | Good coverage |
| May | 18.8°C | 7.6°C | 90 mm | 9.3 | 10.7°C | 14 h 29 | 56 | Good coverage |
| June | 23.5°C | 12.4°C | 107 mm | 8.9 | 15.6°C | 15 h 09 | 78 | Good coverage |
| July | 27°C | 16.3°C | 92 mm | 7.7 | 19.6°C | 14 h 53 | 76 | Good coverage |
| August | 26.5°C | 15.3°C | 97 mm | 6.9 | 20.6°C | 13 h 50 | 79 | Good coverage |
| September | 23°C | 11.4°C | 99 mm | 6.7 | 19.3°C | 12 h 25 | 78 | Good coverage |
| October | 16.8°C | 5.5°C | 140 mm | 9.8 | 16.4°C | 11 h 01 | 39 | Good coverage |
| November | 11.3°C | 0.2°C | 120 mm | 8.5 | 12.6°C | 9 h 48 | 15 | Good coverage |
| December | 6°C | -3.8°C | 145 mm | 10.1 | 9.0°C | 9 h 12 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.0°C12 Jan 2020 | -23.9°C31 Jan 2026 | 73 mm1 Jan 2007 | 213 mm2024 · driest 38 mm in 2020 | 24 |
| February | 21.9°C16 Feb 2023 | -25.4°C21 Feb 2015 | 66 mm13 Feb 2008 | 180 mm2022 · driest 47 mm in 2012 | 25 |
| March | 22.1°C10 Mar 2016 | -21.2°C7 Mar 2015 | 141 mm30 Mar 2010 | 482 mm2010 · driest 22 mm in 2006 | 25 |
| April | 31.5°C17 Apr 2002 | -9.0°C6 Apr 2016 | 74 mm15 Apr 2007 | 220 mm2007 · driest 40 mm in 2026 | 25 |
| May | 33.6°C26 May 2010 | -3.0°C1 May 2008 | 98 mm16 May 2024 | 220 mm2024 · driest 17 mm in 2015 | 25 |
| June | 35.8°C24 Jun 2025 | 1.5°C1 Jun 2009 | 101 mm7 Jun 2013 | 262 mm2006 · driest 19 mm in 2025 | 25 |
| July | 35.9°C6 Jul 2010 | 6.3°C12 Jul 2002 | 93 mm4 Jul 2014 | 287 mm2009 · driest 23 mm in 2022 | 25 |
| August | 34.8°C2 Aug 2006 | 5.1°C28 Aug 2025 | 97 mm15 Aug 2011 | 198 mm2011 · driest 30 mm in 2020 | 24 |
| September | 33.1°C1 Sep 2010 | -0.8°C22 Sep 2020 | 110 mm2 Sep 2021 | 254 mm2008 · driest 14 mm in 2014 | 24 |
| October | 29.0°C9 Oct 2011 | -6.4°C19 Oct 2015 | 99 mm14 Oct 2005 | 367 mm2005 · driest 26 mm in 2024 | 24 |
| November | 26.2°C7 Nov 2022 | -11.9°C23 Nov 2018 | 78 mm30 Nov 2020 | 261 mm2018 · driest 24 mm in 2012 | 24 |
| December | 19.8°C24 Dec 2015 | -18.8°C28 Dec 2004 | 113 mm11 Dec 2024 | 208 mm2019 · driest 45 mm in 2021 | 23 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 27 | 3 |
| February | 0 | 0 | 25 | 4 |
| March | 0 | 0 | 22 | 3 |
| April | <1 | <1 | 10 | 4 |
| May | 3 | <1 | 1 | 3 |
| June | 11 | 1 | 0 | 4 |
| July | 24 | 5 | 0 | 3 |
| August | 22 | 4 | 0 | 3 |
| September | 8 | <1 | <1 | 3 |
| October | <1 | 0 | 5 | 4 |
| November | 0 | 0 | 16 | 4 |
| December | 0 | 0 | 24 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 28% | 11% | 33% | 0.0–6.0°C |
| February | <1% | 32% | 12% | 45% | 1.3–6.9°C |
| March | 1% | 30% | 12% | 37% | 5.8–10.7°C |
| April | 9% | 31% | 12% | 35% | 11.8–15.4°C |
| May | 33% | 30% | 10% | 34% | 17.2–20.6°C |
| June | 66% | 28% | 11% | 33% | 22.6–25.2°C |
| July | 74% | 25% | 10% | 24% | 25.5–28.2°C |
| August | 77% | 23% | 10% | 23% | 25.1–28.1°C |
| September | 64% | 23% | 11% | 25% | 21.9–23.8°C |
| October | 19% | 30% | 13% | 32% | 15.6–19.0°C |
| November | 3% | 27% | 11% | 34% | 9.6–13.9°C |
| December | 0% | 32% | 14% | 40% | 4.1–8.9°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 5221384
- NOAA station
- USW00054797 · KINGSTON 1 W
- Station distance
- 13.5 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 18 usable years
- Daylight
- Calculated from latitude 41.38°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 2 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.