United States · 1991–2020

Best time to visit
Coopersburg.

September leads for comfortable weather in Coopersburg: typically 24.3°C by day, 12.5°C at night, with 132 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.3°C

Typical low12.5°C

Rain in September132 mm

Comfort

September

September · June · August

76climate match

Beach

July

July · August · June

63climate match

Outdoors

May

May · October · September

71climate match

The weakest month is January, scoring 5 against September’s 76 — days reach only 3.4°C, 21° 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

53.4° / -6.5°

Feb

54.9° / -5.9°

Mar

69.6° / -2.1°

Apr

3916.5° / 3.7°

May

6421.6° / 9.4°

Jun

7426.2° / 14.5°

Jul

5829° / 17.2°

Aug

6727.9° / 16.2°

Sep

7624.3° / 12.5°

Oct

4718.1° / 6.5°

Nov

2311.9° / 1.1°

Dec

55.9° / -3.4°

Monthly climate evidence for Coopersburg — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.4°C	-6.5°C	94 mm	9.2	9 h 34	5	Strong coverage
February	4.9°C	-5.9°C	82 mm	7.7	10 h 35	5	Strong coverage
March	9.6°C	-2.1°C	109 mm	8.8	11 h 49	6	Strong coverage
April	16.5°C	3.7°C	108 mm	9.7	13 h 13	39	Strong coverage
May	21.6°C	9.4°C	115 mm	11	14 h 24	64	Strong coverage
June	26.2°C	14.5°C	120 mm	9.6	15 h 03	74	Strong coverage
July	29°C	17.2°C	147 mm	9.7	14 h 48	58	Strong coverage
August	27.9°C	16.2°C	124 mm	9.3	13 h 47	67	Strong coverage
September	24.3°C	12.5°C	132 mm	7.8	12 h 25	76	Strong coverage
October	18.1°C	6.5°C	128 mm	8.7	11 h 03	47	Strong coverage
November	11.9°C	1.1°C	91 mm	7.3	9 h 52	23	Strong coverage
December	5.9°C	-3.4°C	114 mm	8.8	9 h 17	5	Strong coverage

Records at SPRINGTOWN 1 NNE, 1991–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.2°C7 Jan 2007	-27.8°C19 Jan 1994	68 mm10 Jan 2024	198 mm1996 · driest 23 mm in 2025	33
February	25.6°C22 Feb 2018	-20.6°C20 Feb 2015	64 mm13 Feb 2008	181 mm2008 · driest 22 mm in 2004	33
March	31.7°C31 Mar 1998	-17.8°C19 Mar 1993	63 mm8 Mar 1995	189 mm2010 · driest 26 mm in 2012	33
April	34.4°C18 Apr 2002	-8.3°C5 Apr 1995	92 mm16 Apr 2007	210 mm2007 · driest 38 mm in 1992	34
May	33.3°C20 May 1996	-2.8°C9 May 2020	90 mm1 May 2014	286 mm2025 · driest 13 mm in 2015	34
June	35.0°C10 Jun 2011	4.4°C3 Jun 1994	101 mm28 Jun 2006	300 mm2006 · driest 28 mm in 1999	32
July	38.9°C7 Jul 1999	8.3°C2 Jul 2001	110 mm22 Jul 2003	281 mm2004 · driest 12 mm in 1999	31
August	38.3°C1 Aug 1999	7.2°C6 Aug 1994	184 mm28 Aug 2011	394 mm2011 · driest 38 mm in 1995	32
September	36.7°C3 Sep 2010	-1.1°C20 Sep 1993	177 mm2 Sep 2021	310 mm2011 · driest 24 mm in 2005	31
October	32.8°C3 Oct 2019	-4.4°C20 Oct 1992	156 mm1 Oct 2010	354 mm2005 · driest 1 mm in 2024	32
November	27.8°C1 Nov 2024	-13.9°C23 Nov 2018	122 mm3 Nov 2018	291 mm2018 · driest 30 mm in 2012	33
December	23.9°C5 Dec 1998	-17.8°C24 Dec 2022	77 mm1 Dec 2020	253 mm1996 · driest 21 mm in 1998	33

Typical days per month at SPRINGTOWN 1 NNE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	3	6
February	<1	0	25	3	5
March	<1	0	22	4	4
April	3	<1	7	4	1
May	9	2	<1	4	0
June	21	6	0	4	0
July	28	13	0	5	0
August	26	9	0	4	0
September	14	3	0	4	0
October	3	<1	3	3	<1
November	<1	0	14	3	1
December	0	0	25	4	4

How often, not how much — every day in SPRINGTOWN 1 NNE’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%	29%	10%	35%	0.2–6.4°C
February	<1%	28%	11%	33%	2.0–7.8°C
March	6%	28%	12%	36%	6.8–12.5°C
April	22%	32%	12%	40%	14.4–18.6°C
May	47%	35%	13%	48%	19.5–23.1°C
June	66%	32%	13%	37%	24.2–27.6°C
July	69%	31%	15%	39%	26.8–30.7°C
August	69%	30%	12%	34%	26.0–29.6°C
September	66%	27%	14%	30%	22.1–26.6°C
October	29%	27%	10%	29%	16.4–19.8°C
November	7%	24%	9%	24%	9.1–14.3°C
December	<1%	29%	13%	32%	3.6–9.1°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.

1992Each stripe is one year’s mean temperature against the 30-year average. Warmest: 1998. Coolest: 1992.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5185380
NOAA station: USC00368400 · SPRINGTOWN 1 NNE
Station distance: 11.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 40.51°, 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 SPRINGTOWN 1 NNE is what differs

Middletown→Hellertown→Freemansburg→Riegelsville→Center Valley→Finesville→

Or put two places side by side: Coopersburg vs Middletown

Best time to visitCoopersburg.

September

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Coopersburg.

The whole year,
without the guesswork.

Nearby, measured,
and named.