United States · 1991–2020

Best time to visit
Nittany.

September leads for comfortable weather in Nittany: typically 23.6°C by day, 9.7°C at night, with 114 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.6°C

Typical low9.7°C

Rain in September114 mm

Comfort

September

September · June · August

73climate match

Beach

July

July · August · June

64climate match

Outdoors

September

September · May · October

68climate match

The weakest month is January, scoring 5 against September’s 73 — days reach only 0.4°C, 24° 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

50.4° / -9.1°

Feb

52° / -8.2°

Mar

57.6° / -4.3°

Apr

3215.4° / 1.5°

May

6021.6° / 7.3°

Jun

7226.3° / 12.6°

Jul

6829.1° / 15°

Aug

7227.5° / 13.5°

Sep

7323.6° / 9.7°

Oct

4316.5° / 3.9°

Nov

119.3° / -2°

Dec

53.1° / -5.4°

Monthly climate evidence for Nittany — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.4°C	-9.1°C	72 mm	8.3	9 h 32	5	Good coverage
February	2°C	-8.2°C	60 mm	7	10 h 34	5	Good coverage
March	7.6°C	-4.3°C	82 mm	8.4	11 h 49	5	Good coverage
April	15.4°C	1.5°C	98 mm	10.6	13 h 15	32	Good coverage
May	21.6°C	7.3°C	109 mm	11.6	14 h 27	60	Good coverage
June	26.3°C	12.6°C	105 mm	10.5	15 h 06	72	Good coverage
July	29.1°C	15°C	102 mm	9.6	14 h 51	68	Good coverage
August	27.5°C	13.5°C	97 mm	8	13 h 48	72	Good coverage
September	23.6°C	9.7°C	114 mm	8.7	12 h 25	73	Good coverage
October	16.5°C	3.9°C	91 mm	8.4	11 h 02	43	Good coverage
November	9.3°C	-2°C	78 mm	7.2	9 h 50	11	Good coverage
December	3.1°C	-5.4°C	80 mm	8	9 h 14	5	Good coverage

Records at MILLHEIM, 2004–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.3°C9 Jan 2008	-27.2°C17 Jan 2009	51 mm25 Jan 2010	141 mm2024 · driest 17 mm in 2025	21
February	23.3°C25 Feb 2017	-25.6°C24 Feb 2015	52 mm4 Feb 2022	138 mm2018 · driest 20 mm in 2009	21
March	28.9°C23 Mar 2026	-21.1°C6 Mar 2015	70 mm5 Mar 2008	150 mm2011 · driest 26 mm in 2016	21
April	32.8°C28 Apr 2009	-9.4°C4 Apr 2013	56 mm3 Apr 2024	184 mm2011 · driest 42 mm in 2016	22
May	35.0°C31 May 2006	-4.4°C5 May 2005	99 mm16 May 2014	228 mm2025 · driest 26 mm in 2015	21
June	36.1°C26 Jun 2025	1.1°C1 Jun 2009	62 mm11 Jun 2018	214 mm2006 · driest 29 mm in 2024	20
July	40.6°C23 Jul 2011	5.0°C2 Jul 2010	69 mm22 Jul 2018	314 mm2018 · driest 37 mm in 2020	20
August	36.1°C14 Aug 2005	1.7°C31 Aug 2025	83 mm28 Aug 2006	251 mm2023 · driest 28 mm in 2025	21
September	33.3°C8 Sep 2016	-1.1°C18 Sep 2013	114 mm23 Sep 2021	269 mm2021 · driest 21 mm in 2005	21
October	30.6°C10 Oct 2007	-6.1°C13 Oct 2012	99 mm1 Oct 2010	189 mm2017 · driest 31 mm in 2024	21
November	26.7°C1 Nov 2024	-15.0°C30 Nov 2013	63 mm30 Nov 2005	141 mm2018 · driest 16 mm in 2016	21
December	20.0°C17 Dec 2021	-24.4°C15 Dec 2005	51 mm1 Dec 2010	130 mm2008 · driest 31 mm in 2017	21

Typical days per month at MILLHEIM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	29	2	4
February	0	0	26	2	4
March	<1	0	25	2	3
April	3	<1	12	3	<1
May	10	3	2	4	0
June	21	6	0	3	0
July	28	14	0	4	0
August	25	8	0	3	0
September	13	4	<1	3	0
October	3	<1	8	3	<1
November	0	0	21	2	1
December	0	0	27	3	3

How often, not how much — every day in MILLHEIM’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%	28%	7%	31%	-2.5–3.1°C
February	<1%	27%	8%	27%	-1.2–5.0°C
March	5%	29%	9%	36%	4.6–12.0°C
April	22%	34%	11%	43%	13.1–18.4°C
May	41%	36%	11%	49%	19.1–24.2°C
June	60%	33%	12%	41%	25.2–27.6°C
July	65%	31%	12%	36%	27.7–30.7°C
August	69%	27%	11%	29%	26.2–29.3°C
September	63%	28%	10%	33%	22.6–25.7°C
October	24%	26%	8%	26%	14.9–19.5°C
November	4%	27%	9%	29%	6.4–12.3°C
December	<1%	28%	9%	33%	1.0–7.4°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.

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5203457
NOAA station: USC00365790 · MILLHEIM
Station distance: 14.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 41.00°, 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 MILLHEIM is what differs

Zion→Millheim→Howard→Aaronsburg→Mingoville→Rebersburg→

Or put two places side by side: Nittany vs Zion

Best time to visitNittany.

September

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Nittany.

The whole year,
without the guesswork.

Nearby, measured,
and named.