United States · 1991–2020

Best time to visit
Halifax.

May leads for comfortable weather in Halifax: typically 25.4°C by day, 11.5°C at night, with 110 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high25.4°C

Typical low11.5°C

Rain in May110 mm

Comfort

May

May · September · October

73climate match

Beach

August

August · July · June

72climate match

Outdoors

October

October · April · November

76climate match

The weakest month is January, scoring 7 against May’s 73 — days reach only 9.8°C, 14° below the 24°C the score treats as ideal, and nights drop to -3.5°C.

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

79.8° / -3.5°

Feb

1811.7° / -2.5°

Mar

3316° / 0.9°

Apr

6221.5° / 6°

May

7325.4° / 11.5°

Jun

6129.6° / 16.6°

Jul

5231.6° / 19.3°

Aug

5830.7° / 18.5°

Sep

7227.5° / 14.7°

Oct

6922.1° / 7.2°

Nov

3916.4° / 1.1°

Dec

1611.5° / -1.8°

Monthly climate evidence for Halifax — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	9.8°C	-3.5°C	90 mm	8.8	9 h 54	7	Strong coverage
February	11.7°C	-2.5°C	74 mm	8	10 h 47	18	Strong coverage
March	16°C	0.9°C	102 mm	9.1	11 h 51	33	Strong coverage
April	21.5°C	6°C	93 mm	8.6	13 h 05	62	Strong coverage
May	25.4°C	11.5°C	110 mm	9.4	14 h 06	73	Strong coverage
June	29.6°C	16.6°C	124 mm	8.5	14 h 40	61	Strong coverage
July	31.6°C	19.3°C	102 mm	8.9	14 h 27	52	Strong coverage
August	30.7°C	18.5°C	97 mm	7.8	13 h 34	58	Strong coverage
September	27.5°C	14.7°C	119 mm	7.5	12 h 22	72	Strong coverage
October	22.1°C	7.2°C	87 mm	6.5	11 h 11	69	Strong coverage
November	16.4°C	1.1°C	86 mm	6.7	10 h 09	39	Strong coverage
December	11.5°C	-1.8°C	91 mm	8.2	9 h 39	16	Strong coverage

Records at S BOSTON, 1977–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	26.7°C31 Jan 2002	-21.7°C22 Jan 1985	63 mm4 Jan 1992	242 mm1978 · driest 21 mm in 1981	48
February	28.3°C13 Feb 2017	-17.2°C20 Feb 2015	59 mm7 Feb 2020	168 mm2025 · driest 13 mm in 1978	49
March	32.2°C12 Mar 2026	-12.8°C3 Mar 2009	71 mm29 Mar 2010	214 mm1994 · driest 20 mm in 1985	48
April	35.0°C21 Apr 1985	-7.8°C10 Apr 1987	64 mm22 Apr 1992	198 mm2017 · driest 12 mm in 1986	48
May	36.7°C27 May 1989	-2.2°C5 May 1986	110 mm20 May 2001	292 mm2003 · driest 32 mm in 1999	49
June	39.4°C30 Jun 2012	3.3°C4 Jun 1988	177 mm23 Jun 1995	413 mm1995 · driest 2 mm in 2024	49
July	40.0°C6 Jul 2012	5.6°C3 Jul 1988	89 mm13 Jul 2024	230 mm2024 · driest 22 mm in 1986	48
August	40.0°C23 Aug 1983	3.9°C30 Aug 1982	135 mm7 Aug 1996	243 mm1996 · driest 11 mm in 1980	48
September	39.4°C18 Sep 1991	-1.7°C26 Sep 1983	145 mm6 Sep 1996	341 mm1996 · driest 3 mm in 1985	49
October	38.9°C4 Oct 2019	-6.1°C29 Oct 1999	132 mm12 Oct 2018	231 mm1995 · driest 2 mm in 2000	49
November	31.1°C8 Nov 2024	-12.2°C23 Nov 1981	166 mm28 Nov 1993	232 mm1985 · driest 5 mm in 2001	49
December	26.7°C3 Dec 1991	-20.0°C31 Dec 1983	60 mm12 Dec 2008	194 mm2015 · driest 9 mm in 1980	49

Typical days per month at S BOSTON, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	24	3	<1
February	<1	0	22	3	<1
March	3	<1	16	4	<1
April	10	2	4	3	0
May	18	6	<1	3	0
June	27	16	0	4	0
July	30	23	0	3	0
August	30	20	0	3	0
September	23	9	0	3	0
October	10	1	3	3	0
November	2	0	16	3	0
December	<1	0	22	3	<1

How often, not how much — every day in S BOSTON’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	4%	28%	11%	30%	6.8–12.2°C
February	9%	30%	10%	35%	8.2–14.7°C
March	25%	30%	12%	33%	13.4–19.1°C
April	51%	27%	10%	31%	19.6–24.1°C
May	64%	31%	11%	38%	23.6–27.3°C
June	74%	26%	11%	28%	27.9–31.5°C
July	71%	28%	11%	32%	30.1–33.6°C
August	75%	25%	10%	24%	28.9–32.3°C
September	75%	24%	10%	24%	25.8–29.8°C
October	58%	20%	9%	21%	20.2–24.5°C
November	27%	22%	9%	21%	13.9–19.8°C
December	7%	26%	10%	29%	8.7–15.3°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.

1978Each stripe is one year’s mean temperature against the 42-year average. Warmest: 2017. Coolest: 1988.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4762755
NOAA station: USC00447925 · S BOSTON
Station distance: 8.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 36.77°, 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.

These places read the same station, so their numbers are identical — distance from S BOSTON is what differs

South Boston→Mountain Road→Riverdale→Cluster Springs→Clover→Virgilina→

Or put two places side by side: Halifax vs South Boston

Best time to visitHalifax.

May

August

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Halifax.

The whole year,
without the guesswork.

Nearby, measured,
and named.