United States · 1991–2020

Best time to visit
Petersburg.

September leads for comfortable weather in Petersburg: typically 26.4°C by day, 11.5°C at night, with 76 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.4°C

Typical low11.5°C

Rain in September76 mm

Comfort

September

September · May · June

77climate match

Beach

July

July · August · June

67climate match

Outdoors

October

October · April · September

81climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 5.8°C, 18° below the 24°C the score treats as ideal, and nights drop to -5.4°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

55.8° / -5.4°

Feb

57.3° / -4.8°

Mar

2212.4° / -1.1°

Apr

5219.3° / 4°

May

6923.6° / 9.1°

Jun

6928.2° / 14.2°

Jul

6330.3° / 16.6°

Aug

6629.5° / 15.9°

Sep

7726.4° / 11.5°

Oct

6019.5° / 5.1°

Nov

3213.2° / -0.1°

Dec

57.8° / -3.5°

Monthly climate evidence for Petersburg — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	5.8°C	-5.4°C	63 mm	6.5	9 h 42	5	Good coverage
February	7.3°C	-4.8°C	51 mm	6.2	10 h 40	5	Good coverage
March	12.4°C	-1.1°C	77 mm	8.5	11 h 50	22	Good coverage
April	19.3°C	4°C	79 mm	9.8	13 h 10	52	Good coverage
May	23.6°C	9.1°C	111 mm	12.3	14 h 17	69	Good coverage
June	28.2°C	14.2°C	97 mm	10.3	14 h 53	69	Strong coverage
July	30.3°C	16.6°C	94 mm	9.1	14 h 39	63	Good coverage
August	29.5°C	15.9°C	94 mm	9.5	13 h 41	66	Good coverage
September	26.4°C	11.5°C	76 mm	6.9	12 h 24	77	Good coverage
October	19.5°C	5.1°C	64 mm	6.6	11 h 06	60	Good coverage
November	13.2°C	-0.1°C	55 mm	6.1	9 h 59	32	Good coverage
December	7.8°C	-3.5°C	68 mm	7.2	9 h 27	5	Good coverage

Records at PETERSBURG, 1994–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.9°C13 Jan 2017	-23.3°C22 Jan 2025	41 mm26 Jan 2013	118 mm1999 · driest 13 mm in 2023	28
February	25.6°C25 Feb 2017	-23.9°C5 Feb 1996	78 mm17 Feb 2003	127 mm2003 · driest 8 mm in 2013	27
March	32.2°C23 Mar 2026	-20.6°C6 Mar 2015	57 mm5 Mar 2008	129 mm1997 · driest 11 mm in 2006	26
April	39.4°C28 Apr 2009	-7.2°C11 Apr 2016	52 mm15 Apr 2007	137 mm2011 · driest 3 mm in 2010	28
May	34.4°C28 May 2012	-2.2°C22 May 2002	54 mm19 May 2001	214 mm1996 · driest 43 mm in 2006	25
June	37.8°C30 Jun 2012	3.3°C2 Jun 2025	69 mm2 Jun 1997	158 mm2016 · driest 23 mm in 1999	30
July	40.0°C23 Jul 2011	7.8°C31 Jul 1997	71 mm13 Jul 2002	201 mm2002 · driest 3 mm in 2010	26
August	37.8°C14 Aug 2021	5.6°C30 Aug 2025	89 mm6 Aug 1995	156 mm2003 · driest 4 mm in 2025	27
September	38.3°C8 Sep 2015	0.6°C22 Sep 2020	81 mm19 Sep 2003	170 mm2003 · driest 1 mm in 2005	25
October	31.7°C8 Oct 2007	-7.8°C23 Oct 1997	58 mm30 Oct 2012	136 mm2006 · driest 1 mm in 2024	27
November	32.2°C6 Nov 2015	-12.8°C29 Nov 2023	49 mm22 Nov 2023	139 mm1997 · driest 6 mm in 2024	28
December	26.7°C6 Dec 2001	-19.4°C24 Dec 2022	52 mm7 Dec 2013	139 mm2013 · driest 15 mm in 2021	27

Typical days per month at PETERSBURG, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	25	2	3
February	<1	0	22	1	3
March	1	<1	18	2	2
April	6	1	7	3	<1
May	13	5	1	3	0
June	22	11	0	3	0
July	27	17	0	3	0
August	26	14	0	3	0
September	17	7	0	2	0
October	6	<1	5	2	<1
November	<1	0	17	2	<1
December	<1	0	22	2	2

How often, not how much — every day in PETERSBURG’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	2%	20%	8%	15%	3.0–8.7°C
February	4%	22%	5%	19%	3.5–10.9°C
March	15%	28%	7%	32%	8.6–16.3°C
April	35%	32%	9%	41%	17.2–22.6°C
May	49%	40%	13%	52%	20.9–26.3°C
June	64%	35%	11%	43%	26.0–30.0°C
July	68%	30%	10%	34%	28.2–32.9°C
August	69%	30%	10%	33%	27.6–31.3°C
September	69%	25%	8%	25%	23.7–29.6°C
October	42%	21%	7%	21%	18.0–21.3°C
November	14%	20%	5%	17%	10.0–16.1°C
December	4%	23%	7%	22%	4.5–11.1°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 4818030
NOAA station: USC00466952 · PETERSBURG
Station distance: 1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 38.99°, 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 PETERSBURG is what differs

Bergton→Arthur→Brake→Cabins→Dorcas→Durgon→

Or put two places side by side: Petersburg vs Bergton

Best time to visitPetersburg.