Canada · 1991–2020

Best time to visit
Birnam.

August leads for comfortable weather in Birnam: typically 25.8°C by day, 14.7°C at night, with 71 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high25.8°C

Typical low14.7°C

Rain in August71 mm

Comfort

August

August · June · July

83climate match

Beach

July

July · August · June

62climate match

Outdoors

May

May · September · June

76climate match

The weakest month is January, scoring 5 against August’s 83 — days reach only -1.3°C, 25° 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

5-1.3° / -7.8°

Feb

50° / -7.6°

Mar

55.4° / -3.4°

Apr

2512.6° / 2°

May

5719.3° / 7.6°

Jun

8224.6° / 13°

Jul

7726.7° / 15.5°

Aug

8325.8° / 14.7°

Sep

7222.3° / 11°

Oct

3915.4° / 6°

Nov

67.9° / 1°

Dec

51.5° / -4.3°

Monthly climate evidence for Birnam — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 36 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-1.3°C	-7.8°C	82 mm	14.5	2.5°C	9 h 20	5	Good coverage
February	0°C	-7.6°C	64 mm	11	1.0°C	10 h 27	5	Good coverage
March	5.4°C	-3.4°C	59 mm	10.7	1.0°C	11 h 47	5	Good coverage
April	12.6°C	2°C	81 mm	11.3	2.6°C	13 h 20	25	Good coverage
May	19.3°C	7.6°C	82 mm	11.2	6.1°C	14 h 38	57	Good coverage
June	24.6°C	13°C	80 mm	9.3	13.8°C	15 h 21	82	Good coverage
July	26.7°C	15.5°C	89 mm	9.4	19.9°C	15 h 04	77	Good coverage
August	25.8°C	14.7°C	71 mm	8.6	21.3°C	13 h 56	83	Good coverage
September	22.3°C	11°C	97 mm	9.8	19.3°C	12 h 26	72	Good coverage
October	15.4°C	6°C	91 mm	12.1	14.5°C	10 h 57	39	Good coverage
November	7.9°C	1°C	92 mm	11.9	9.4°C	9 h 39	6	Good coverage
December	1.5°C	-4.3°C	86 mm	14	5.5°C	9 h 01	5	Good coverage

Records at THEDFORD, 1986–2014
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.5°C7 Jan 2008	-33.0°C19 Jan 1994	31 mm17 Jan 2006	122 mm1994 · driest 30 mm in 1988	28
February	21.5°C26 Feb 2000	-30.0°C10 Feb 1994	40 mm11 Feb 2009	113 mm2008 · driest 11 mm in 1987	26
March	28.0°C21 Mar 2012	-23.5°C3 Mar 2003	25 mm7 Mar 2009	143 mm1998 · driest 19 mm in 2010	27
April	30.0°C25 Apr 1990	-9.0°C5 Apr 1995	63 mm20 Apr 2000	171 mm2013 · driest 28 mm in 2008	27
May	33.0°C28 May 2012	-2.5°C20 May 2002	44 mm20 May 1996	154 mm1997 · driest 33 mm in 1988	27
June	38.0°C25 Jun 1988	1.5°C4 Jun 1998	78 mm12 Jun 1999	197 mm1996 · driest 5 mm in 1986	28
July	38.0°C17 Jul 2012	5.5°C2 Jul 2007	88 mm8 Jul 1992	189 mm1992 · driest 29 mm in 1989	28
August	37.0°C8 Aug 2001	5.0°C22 Aug 1988	86 mm15 Aug 1991	163 mm1997 · driest 10 mm in 2010	28
September	36.0°C10 Sep 2013	-1.5°C30 Sep 1993	107 mm10 Sep 1986	255 mm1996 · driest 22 mm in 1995	28
October	32.5°C8 Oct 2007	-5.5°C31 Oct 1988	66 mm5 Oct 1995	207 mm2006 · driest 34 mm in 2005	28
November	23.0°C1 Nov 1999	-13.0°C15 Nov 1996	77 mm20 Nov 2008	213 mm2008 · driest 30 mm in 1986	28
December	17.5°C6 Dec 1998	-25.5°C12 Dec 1988	45 mm11 Dec 2000	145 mm2000 · driest 40 mm in 1995	28

Typical days per month at THEDFORD, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	11
February	0	0	26	2	9
March	<1	0	24	2	6
April	1	0	13	3	1
May	6	1	1	2	0
June	15	5	0	3	0
July	21	7	0	3	0
August	18	5	0	2	0
September	10	2	<1	3	0
October	2	<1	4	3	<1
November	0	0	14	3	3
December	0	0	26	3	9

How often, not how much — every day in THEDFORD’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%	45%	7%	61%	-4.5–2.1°C
February	0%	39%	7%	54%	-2.9–2.7°C
March	3%	34%	6%	47%	2.9–7.7°C
April	9%	38%	8%	53%	9.9–14.6°C
May	30%	35%	8%	48%	16.9–22.0°C
June	55%	30%	9%	38%	23.1–26.4°C
July	67%	29%	10%	34%	24.6–28.8°C
August	68%	29%	9%	31%	23.8–27.6°C
September	46%	34%	12%	48%	20.4–24.3°C
October	14%	41%	9%	57%	12.9–16.6°C
November	1%	40%	10%	60%	5.6–10.1°C
December	0%	45%	9%	65%	-1.3–4.4°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.

1987Each stripe is one year’s mean temperature against the 26-year average. Warmest: 2012. Coolest: 1993.2013

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5901869
NOAA station: CA00612HKLR · THEDFORD
Station distance: 14.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 43.05°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 36 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 THEDFORD is what differs

Lambton Shores→Grand Bend→Forest→Beach O'Pines→Cedar Point→Corbett→

Or put two places side by side: Birnam vs Lambton Shores

Best time to visitBirnam.

August

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Birnam.

The whole year,
without the guesswork.

Nearby, measured,
and named.