Canada · 1991–2020

Best time to visit
Colchester.

June leads for comfortable weather in Colchester: typically 25.2°C by day, 15.2°C at night, with 83 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high25.2°C

Typical low15.2°C

Rain in June83 mm

Comfort

June

June · September · August

85climate match

Beach

July

July · August · June

75climate match

Outdoors

May

May · September · October

81climate match

The weakest month is January, scoring 5 against June’s 85 — days reach only -0.3°C, 24° 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

5-0.3° / -7°

Feb

50.9° / -6.4°

Mar

56.1° / -2.4°

Apr

3113.5° / 3.1°

May

6219.8° / 9.5°

Jun

8525.2° / 15.2°

Jul

7427.8° / 17.4°

Aug

7926.4° / 16.6°

Sep

8322.9° / 12.8°

Oct

5016.1° / 7.2°

Nov

158.8° / 1.3°

Dec

52.1° / -3.8°

Monthly climate evidence for Colchester — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 13 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-0.3°C	-7°C	55 mm	9.5	1.2°C	9 h 26	5	Good coverage
February	0.9°C	-6.4°C	60 mm	9	0.7°C	10 h 31	5	Good coverage
March	6.1°C	-2.4°C	75 mm	10.1	1.8°C	11 h 48	5	Good coverage
April	13.5°C	3.1°C	82 mm	9.9	6.0°C	13 h 17	31	Good coverage
May	19.8°C	9.5°C	88 mm	10.2	12.6°C	14 h 32	62	Good coverage
June	25.2°C	15.2°C	83 mm	7.5	19.4°C	15 h 13	85	Good coverage
July	27.8°C	17.4°C	77 mm	7.2	23.8°C	14 h 57	74	Good coverage
August	26.4°C	16.6°C	79 mm	7.1	24.0°C	13 h 52	79	Good coverage
September	22.9°C	12.8°C	74 mm	7.1	21.3°C	12 h 26	83	Good coverage
October	16.1°C	7.2°C	70 mm	8.1	15.0°C	11 h	50	Good coverage
November	8.8°C	1.3°C	72 mm	8.5	8.3°C	9 h 45	15	Good coverage
December	2.1°C	-3.8°C	66 mm	9.1	3.5°C	9 h 08	5	Good coverage

Records at HARROW CDA AUTO, 2000–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.1°C7 Jan 2008	-26.7°C25 Jan 2004	46 mm13 Jan 2013	118 mm2024 · driest 7 mm in 2007	25
February	19.5°C27 Feb 2024	-24.9°C12 Feb 2014	45 mm11 Feb 2009	110 mm2008 · driest 8 mm in 2024	25
March	24.5°C21 Mar 2012	-22.8°C3 Mar 2003	48 mm10 Mar 2009	136 mm2016 · driest 4 mm in 2013	25
April	27.7°C26 Apr 2009	-7.6°C1 Apr 2019	96 mm3 Apr 2015	152 mm2014 · driest 26 mm in 2012	26
May	32.1°C28 May 2012	-3.3°C8 May 2020	44 mm25 May 2011	177 mm2011 · driest 14 mm in 2009	25
June	35.2°C25 Jun 2005	4.2°C4 Jun 2009	60 mm18 Jun 2018	134 mm2008 · driest 16 mm in 2005	26
July	37.8°C21 Jul 2011	7.3°C2 Jul 2001	58 mm17 Jul 2022	157 mm2023 · driest 13 mm in 2009	25
August	35.8°C8 Aug 2001	6.4°C30 Aug 2025	123 mm24 Aug 2023	321 mm2023 · driest 9 mm in 2013	26
September	33.3°C10 Sep 2013	1.6°C19 Sep 2020	62 mm3 Sep 2015	176 mm2011 · driest 27 mm in 2004	26
October	30.3°C1 Oct 2019	-4.4°C30 Oct 2008	54 mm19 Oct 2011	149 mm2001 · driest 5 mm in 2005	26
November	22.8°C4 Nov 2003	-15.6°C13 Nov 2019	62 mm29 Nov 2011	189 mm2011 · driest 15 mm in 2012	25
December	17.6°C5 Dec 2001	-21.9°C27 Dec 2004	33 mm16 Dec 2000	102 mm2008 · driest 30 mm in 2017	25

Typical days per month at HARROW CDA AUTO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	26	1
February	0	0	25	2
March	0	0	20	2
April	<1	0	7	3
May	6	<1	<1	3
June	14	4	0	2
July	24	8	0	2
August	22	3	0	3
September	9	1	0	2
October	1	<1	2	2
November	0	0	12	2
December	0	0	23	2

How often, not how much — every day in HARROW CDA AUTO’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	30%	5%	37%	-3.9–2.8°C
February	0%	31%	6%	38%	-2.2–4.4°C
March	1%	31%	7%	43%	3.9–10.0°C
April	11%	34%	10%	45%	11.8–15.9°C
May	34%	32%	9%	38%	17.8–22.1°C
June	69%	25%	9%	26%	23.7–26.5°C
July	76%	24%	8%	26%	26.1–29.3°C
August	75%	24%	9%	24%	25.0–27.9°C
September	62%	23%	7%	26%	21.3–24.4°C
October	22%	26%	7%	28%	14.4–18.2°C
November	1%	27%	7%	31%	6.3–11.4°C
December	0%	30%	7%	37%	-0.7–5.9°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.

2001Each stripe is one year’s mean temperature against the 23-year average. Warmest: 2024. Coolest: 2009.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5924984
NOAA station: CA006133362 · HARROW CDA AUTO
Station distance: 6.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 41.98°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 13 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.

These places read the same station, so their numbers are identical — distance from HARROW CDA AUTO is what differs

Harrow→Ambassador Beach→Arner→Barretville→Belcreft Beach→East Harrow→

Or put two places side by side: Colchester vs Harrow

Best time to visitColchester.

June

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Colchester.

The whole year,
without the guesswork.

Nearby, measured,
and named.