United States · 1991–2020

Best time to visit
Oak Valley.

May leads for comfortable weather in Oak Valley: typically 23.5°C by day, 12.8°C at night, with 85 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high23.5°C

Typical low12.8°C

Rain in May85 mm

Comfort

May

May · September · June

82climate match

Beach

August

August · July · June

78climate match

Outdoors

October

October · April · May

85climate match

The weakest month is January, scoring 5 against May’s 82 — days reach only 5.2°C, 19° 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

55.2° / -2.9°

Feb

56.8° / -2.1°

Mar

2111.5° / 1.7°

Apr

5418.1° / 7.2°

May

8223.5° / 12.8°

Jun

6528.4° / 18.2°

Jul

5031° / 21.3°

Aug

5729.8° / 20.4°

Sep

7626° / 16.5°

Oct

6519.5° / 10°

Nov

3613.3° / 4.2°

Dec

57.8° / 0°

Monthly climate evidence for Oak Valley — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	5.2°C	-2.9°C	80 mm	8.5	9 h 38	5	Strong coverage
February	6.8°C	-2.1°C	70 mm	7.6	10 h 38	5	Strong coverage
March	11.5°C	1.7°C	101 mm	8.6	11 h 49	21	Strong coverage
April	18.1°C	7.2°C	88 mm	8.3	13 h 12	54	Strong coverage
May	23.5°C	12.8°C	85 mm	8.5	14 h 21	82	Strong coverage
June	28.4°C	18.2°C	103 mm	8.5	14 h 58	65	Strong coverage
July	31°C	21.3°C	111 mm	8.1	14 h 44	50	Strong coverage
August	29.8°C	20.4°C	109 mm	7.1	13 h 44	57	Strong coverage
September	26°C	16.5°C	112 mm	7.5	12 h 24	76	Strong coverage
October	19.5°C	10°C	88 mm	6.8	11 h 05	65	Strong coverage
November	13.3°C	4.2°C	74 mm	6.8	9 h 56	36	Strong coverage
December	7.8°C	0°C	101 mm	8.7	9 h 22	5	Strong coverage

What has changed

Oak Valley runs +1.5°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

+2.2

Feb

+2.7

Mar

+1.4

Apr

+1.5

May

+1.0

Jun

+1.1

Jul

+1.6

Aug

+0.7

Sep

+1.3

Oct

+1.3

Nov

+0.7

Dec

+2.5

May daytime highs, 2011–2025. Last recorded: 23.2°C.

Records at PHILA INTL AP, 1940–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.3°C26 Jan 1950	-21.7°C22 Jan 1984	59 mm23 Jan 1998	225 mm1978 · driest 11 mm in 1955	86
February	25.0°C21 Feb 2018	-20.0°C2 Feb 1961	50 mm13 Feb 1966	163 mm1979 · driest 14 mm in 2002	86
March	30.6°C29 Mar 1945	-13.9°C10 Mar 1984	79 mm23 Mar 2024	186 mm2010 · driest 17 mm in 1966	86
April	35.0°C17 Apr 2002	-7.2°C7 Apr 1982	112 mm30 Apr 2014	230 mm2007 · driest 13 mm in 1985	86
May	36.7°C19 May 2026	-2.2°C11 May 1966	63 mm2 May 1989	188 mm1948 · driest 6 mm in 2023	86
June	38.3°C24 Jun 2025	6.7°C17 Jun 1964	117 mm29 Jun 1973	268 mm2013 · driest 3 mm in 1949	86
July	40.0°C3 Jul 1966	10.6°C21 Jul 1966	204 mm28 Jul 2013	336 mm2013 · driest 16 mm in 1957	86
August	38.3°C9 Aug 2001	6.7°C29 Aug 1986	123 mm14 Aug 2011	491 mm2011 · driest 13 mm in 1964	85
September	37.8°C2 Sep 1953	1.7°C25 Sep 1963	168 mm16 Sep 1999	332 mm1999 · driest 6 mm in 2005	85
October	35.6°C5 Oct 1941	-3.9°C25 Oct 1962	141 mm8 Oct 2005	221 mm2005 · driest 0 mm in 2024	85
November	28.9°C1 Nov 1950	-9.4°C30 Nov 1976	101 mm7 Nov 1977	230 mm1972 · driest 8 mm in 1976	85
December	22.8°C7 Dec 1998	-17.2°C25 Dec 1983	74 mm13 Dec 1941	225 mm2009 · driest 6 mm in 1955	86

Typical days per month at PHILA INTL AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	23	3	4
February	0	0	20	3	4
March	<1	0	12	4	2
April	4	<1	<1	3	<1
May	12	4	0	3	0
June	24	12	0	4	0
July	30	21	0	3	0
August	29	16	0	3	0
September	19	6	0	3	0
October	5	<1	<1	3	0
November	<1	0	5	3	<1
December	0	0	17	4	2

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 88); on 2011–2025 it is May (89). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in PHILA INTL AP’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	<1%	27%	9%	29%	1.1–7.9°C
February	1%	26%	9%	28%	2.8–9.6°C
March	8%	28%	11%	31%	8.3–14.3°C
April	28%	28%	10%	31%	15.3–20.3°C
May	57%	29%	10%	36%	20.9–25.2°C
June	71%	28%	11%	30%	26.3–29.5°C
July	75%	26%	10%	26%	29.0–32.5°C
August	76%	24%	10%	22%	27.9–31.1°C
September	71%	23%	9%	23%	23.9–27.6°C
October	40%	20%	8%	16%	17.5–21.5°C
November	8%	24%	9%	22%	10.8–15.3°C
December	<1%	26%	10%	29%	3.5–9.9°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.

1941Each stripe is one year’s mean temperature against the 84-year average. Warmest: 2024. Coolest: 1963.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4828875
NOAA station: USW00013739 · PHILA INTL AP
Station distance: 9.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 39.80°, 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 PHILA INTL AP is what differs

Sewell→Drexel Hill→Springfield→Elmwood→Paschall→Bellmawr→

Or put two places side by side: Oak Valley vs Sewell

Best time to visitOak Valley.

May

August

October

The whole year,without the guesswork.

Oak Valley runs +1.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Oak Valley.

The whole year,
without the guesswork.

Oak Valley runs +1.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.