May
May · September · June
78climate match
United States · 1991–2020
Best time to visit
Chesterbrook.
May leads for comfortable weather in Chesterbrook: typically 23.6°C by day, 10.2°C at night, with 84 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high23.6°C
Typical low10.2°C
Rain in May84 mm
August
August · July · June
70climate match
October
October · May · April
76climate match
The weakest month is January, scoring 5 against May’s 78 — days reach only 5.1°C, 19° 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
55.1° / -5.1°
Feb
56.5° / -4.8°
Mar
1611.2° / -0.7°
Apr
4918.2° / 4.7°
May
7823.6° / 10.2°
Jun
7028.5° / 15.8°
Jul
5630.6° / 18.4°
Aug
6129.9° / 17.7°
Sep
7726° / 13.2°
Oct
5719.5° / 6.7°
Nov
2913° / 0.9°
Dec
57.2° / -2.9°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 5.1°C | -5.1°C | 84 mm | 7.9 | 9 h 37 | 5 | Good coverage |
| February | 6.5°C | -4.8°C | 71 mm | 7.4 | 10 h 37 | 5 | Strong coverage |
| March | 11.2°C | -0.7°C | 94 mm | 8.4 | 11 h 49 | 16 | Good coverage |
| April | 18.2°C | 4.7°C | 92 mm | 8.6 | 13 h 12 | 49 | Strong coverage |
| May | 23.6°C | 10.2°C | 84 mm | 8.2 | 14 h 22 | 78 | Strong coverage |
| June | 28.5°C | 15.8°C | 102 mm | 8 | 15 h 00 | 70 | Good coverage |
| July | 30.6°C | 18.4°C | 117 mm | 8.3 | 14 h 45 | 56 | Strong coverage |
| August | 29.9°C | 17.7°C | 111 mm | 7.5 | 13 h 45 | 61 | Strong coverage |
| September | 26°C | 13.2°C | 106 mm | 6.8 | 12 h 24 | 77 | Strong coverage |
| October | 19.5°C | 6.7°C | 105 mm | 7.1 | 11 h 04 | 57 | Strong coverage |
| November | 13°C | 0.9°C | 77 mm | 6.8 | 9 h 54 | 29 | Strong coverage |
| December | 7.2°C | -2.9°C | 105 mm | 8.6 | 9 h 20 | 5 | Strong coverage |
What has changed
Chesterbrook 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
+1.1
Feb
+1.5
Mar
+0.4
Apr
+0.9
May
+0.1
Jun
+0.8
Jul
+1.4
Aug
+0.7
Sep
+0.9
Oct
+0.5
Nov
+0.1
Dec
+1.9
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 25.0°C26 Jan 1950 | -28.3°C22 Jan 1961 | 64 mm3 Jan 1936 | 255 mm1979 · driest 11 mm in 1981 | 105 |
| February | 26.1°C21 Feb 2018 | -26.7°C28 Feb 1934 | 88 mm1 Feb 1915 | 170 mm2010 · driest 17 mm in 2002 | 109 |
| March | 32.2°C22 Mar 1948 | -18.9°C7 Mar 1960 | 68 mm20 Mar 1958 | 196 mm2010 · driest 18 mm in 2006 | 107 |
| April | 35.0°C18 Apr 1976 | -11.7°C1 Apr 1923 | 101 mm15 Apr 2007 | 229 mm2007 · driest 9 mm in 1985 | 111 |
| May | 37.2°C7 May 1930 | -2.8°C5 May 1966 | 90 mm21 May 1894 | 267 mm1894 · driest 8 mm in 2023 | 109 |
| June | 40.0°C7 Jun 1925 | 0.6°C3 Jun 1986 | 111 mm8 Jun 1938 | 292 mm1938 · driest 4 mm in 2020 | 106 |
| July | 43.9°C9 Jul 1936 | 5.6°C4 Jul 1986 | 148 mm9 Jul 1935 | 242 mm2019 · driest 15 mm in 1944 | 108 |
| August | 40.0°C1 Aug 1933 | 1.1°C30 Aug 1986 | 203 mm28 Aug 2011 | 411 mm2011 · driest 14 mm in 1964 | 108 |
| September | 40.6°C2 Sep 1953 | -2.2°C28 Sep 1947 | 151 mm12 Sep 1960 | 273 mm2004 · driest 3 mm in 2007 | 106 |
| October | 37.8°C5 Oct 1941 | -7.8°C28 Oct 1936 | 234 mm1 Oct 2010 | 316 mm2010 · driest 0 mm in 2024 | 109 |
| November | 30.0°C1 Nov 1950 | -18.3°C26 Nov 1938 | 152 mm25 Nov 1950 | 253 mm1972 · driest 9 mm in 1917 | 110 |
| December | 25.0°C7 Dec 1998 | -22.2°C17 Dec 1951 | 73 mm5 Dec 1993 | 234 mm2023 · driest 9 mm in 1955 | 106 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 25 | 3 |
| February | 0 | 0 | 24 | 2 |
| March | <1 | 0 | 18 | 4 |
| April | 4 | <1 | 5 | 3 |
| May | 13 | 5 | <1 | 3 |
| June | 24 | 12 | 0 | 3 |
| July | 28 | 19 | 0 | 3 |
| August | 27 | 16 | 0 | 3 |
| September | 18 | 5 | 0 | 3 |
| October | 5 | <1 | 3 | 3 |
| November | <1 | 0 | 15 | 3 |
| December | 0 | 0 | 23 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 27% | 9% | 27% | 1.7–8.1°C |
| February | 2% | 28% | 9% | 29% | 3.3–9.6°C |
| March | 9% | 28% | 11% | 33% | 8.5–15.2°C |
| April | 31% | 29% | 10% | 35% | 15.9–20.8°C |
| May | 60% | 30% | 11% | 35% | 21.5–27.0°C |
| June | 71% | 28% | 11% | 30% | 26.7–30.6°C |
| July | 73% | 27% | 11% | 28% | 29.2–32.9°C |
| August | 75% | 25% | 11% | 23% | 27.6–31.8°C |
| September | 72% | 23% | 10% | 22% | 23.9–28.5°C |
| October | 42% | 22% | 9% | 20% | 17.8–22.5°C |
| November | 8% | 24% | 9% | 23% | 10.5–15.7°C |
| December | <1% | 27% | 11% | 29% | 3.7–9.5°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 5184086
- NOAA station
- USC00366927 · PHOENIXVILLE 1 E
- Station distance
- 5.6 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 24 usable years
- Daylight
- Calculated from latitude 40.08°, 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.