July
July · August · June
77climate match
Canada · 1991–2020
Best time to visit
Chertsey.
July leads for comfortable weather in Chertsey: typically 24.5°C by day, 13.8°C at night, with 112 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortJuly
Typical high24.5°C
Typical low13.8°C
Rain in July112 mm
July
July · August · June
44climate match
September
September · June · May
71climate match
The weakest month is January, scoring 5 against July’s 77 — days reach only -6.8°C, 31° 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
5-6.8° / -17.6°
Feb
5-4.6° / -16.9°
Mar
51.4° / -10.4°
Apr
58.6° / -2.3°
May
4517.6° / 5.7°
Jun
6722.3° / 11.2°
Jul
7724.5° / 13.8°
Aug
7723.3° / 12.9°
Sep
5318.4° / 8.4°
Oct
1310.6° / 2.2°
Nov
53.1° / -4.4°
Dec
5-3.5° / -12°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -6.8°C | -17.6°C | 97 mm | 14.1 | 9 h 00 | 5 | Strong coverage |
| February | -4.6°C | -16.9°C | 67 mm | 10.7 | 10 h 16 | 5 | Strong coverage |
| March | 1.4°C | -10.4°C | 81 mm | 11.1 | 11 h 45 | 5 | Strong coverage |
| April | 8.6°C | -2.3°C | 89 mm | 9.8 | 13 h 28 | 5 | Strong coverage |
| May | 17.6°C | 5.7°C | 102 mm | 11.5 | 14 h 56 | 45 | Strong coverage |
| June | 22.3°C | 11.2°C | 123 mm | 12.1 | 15 h 44 | 67 | Strong coverage |
| July | 24.5°C | 13.8°C | 112 mm | 11.8 | 15 h 25 | 77 | Strong coverage |
| August | 23.3°C | 12.9°C | 107 mm | 10.8 | 14 h 09 | 77 | Strong coverage |
| September | 18.4°C | 8.4°C | 108 mm | 10.8 | 12 h 29 | 53 | Strong coverage |
| October | 10.6°C | 2.2°C | 119 mm | 12 | 10 h 50 | 13 | Strong coverage |
| November | 3.1°C | -4.4°C | 94 mm | 11.2 | 9 h 22 | 5 | Strong coverage |
| December | -3.5°C | -12°C | 98 mm | 13.6 | 8 h 39 | 5 | Strong coverage |
What has changed
Chertsey runs +1.3°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
+1.5
Feb
+1.2
Mar
+1.1
Apr
0.0
May
+1.6
Jun
+0.6
Jul
+1.0
Aug
+1.2
Sep
+2.0
Oct
+1.8
Nov
+0.6
Dec
+2.7
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 10.0°C19 Jan 1973 | -40.0°C15 Jan 1965 | 49 mm8 Jan 1978 | 148 mm1978 · driest 28 mm in 1970 | 60 |
| February | 12.5°C27 Feb 2000 | -41.7°C23 Feb 1972 | 60 mm20 Feb 1996 | 189 mm1981 · driest 5 mm in 1978 | 60 |
| March | 24.0°C21 Mar 2012 | -33.3°C2 Mar 1980 | 52 mm17 Mar 1973 | 157 mm1998 · driest 14 mm in 1967 | 62 |
| April | 29.5°C27 Apr 1990 | -22.2°C3 Apr 1969 | 53 mm9 Apr 1980 | 196 mm2005 · driest 0 mm in 2019 | 61 |
| May | 33.7°C27 May 2020 | -6.7°C5 May 1974 | 71 mm16 May 2014 | 207 mm1983 · driest 26 mm in 1977 | 62 |
| June | 34.5°C1 Jun 2023 | -0.6°C9 Jun 1980 | 67 mm21 Jun 1972 | 202 mm1981 · driest 26 mm in 2021 | 62 |
| July | 35.0°C9 Jul 1988 | 3.9°C6 Jul 1965 | 101 mm1 Jul 1979 | 229 mm1992 · driest 0 mm in 2020 | 61 |
| August | 36.1°C1 Aug 1975 | 1.1°C31 Aug 1976 | 77 mm13 Aug 2014 | 219 mm1988 · driest 8 mm in 2021 | 59 |
| September | 33.5°C9 Sep 2002 | -5.0°C29 Sep 1980 | 82 mm9 Sep 2004 | 224 mm2010 · driest 23 mm in 2023 | 57 |
| October | 28.8°C4 Oct 2023 | -9.0°C31 Oct 1988 | 82 mm5 Oct 1979 | 196 mm2006 · driest 26 mm in 1994 | 59 |
| November | 20.0°C5 Nov 2022 | -25.6°C27 Nov 1978 | 63 mm26 Nov 1999 | 202 mm1963 · driest 0 mm in 2022 | 61 |
| December | 14.0°C24 Dec 2015 | -36.5°C29 Dec 1993 | 45 mm23 Dec 2004 | 192 mm1973 · driest 0 mm in 2020 | 59 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | 3 | 15 |
| February | 0 | 0 | 27 | 2 | 12 |
| March | 0 | 0 | 29 | 3 | 9 |
| April | <1 | 0 | 21 | 3 | 3 |
| May | 4 | <1 | 4 | 4 | <1 |
| June | 9 | 1 | 0 | 4 | 0 |
| July | 15 | 2 | 0 | 4 | 0 |
| August | 11 | <1 | 0 | 3 | 0 |
| September | 3 | <1 | 1 | 4 | 0 |
| October | <1 | 0 | 11 | 4 | 1 |
| November | 0 | 0 | 24 | 3 | 7 |
| December | 0 | 0 | 30 | 3 | 14 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 43% | 8% | 60% | -10.5–-3.8°C |
| February | 0% | 36% | 7% | 52% | -8.0–-1.8°C |
| March | <1% | 34% | 9% | 44% | -0.9–4.3°C |
| April | 3% | 33% | 10% | 41% | 6.5–11.2°C |
| May | 25% | 35% | 11% | 48% | 15.0–20.1°C |
| June | 48% | 40% | 13% | 52% | 20.2–23.8°C |
| July | 59% | 36% | 12% | 49% | 22.6–26.2°C |
| August | 53% | 37% | 11% | 47% | 21.0–24.7°C |
| September | 25% | 36% | 11% | 51% | 16.0–20.1°C |
| October | 6% | 37% | 12% | 48% | 8.3–13.5°C |
| November | 0% | 40% | 10% | 63% | 0.3–5.3°C |
| December | 0% | 45% | 10% | 68% | -7.1–-1.5°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 5920996
- NOAA station
- CA007037310 · ST HIPPOLYTE
- Station distance
- 12.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 25 usable years
- Daylight
- Calculated from latitude 46.07°, 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.