United States · 1991–2020

Best time to visit
Alpena.

May leads for comfortable weather in Alpena: typically 24.8°C by day, 13.4°C at night, with 122 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high24.8°C

Typical low13.4°C

Rain in May122 mm

Comfort

May

May · September · October

77climate match

Beach

August

August · June · July

76climate match

Outdoors

October

October · April · March

78climate match

The weakest month is January, scoring 9 against May’s 77 — days reach only 8.2°C, 16° below the 24°C the score treats as ideal, and nights drop to -2.4°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

98.2° / -2.4°

Feb

2210.7° / -0.6°

Mar

3815.7° / 3.6°

Apr

6120.9° / 8.6°

May

7724.8° / 13.4°

Jun

6429.4° / 18°

Jul

5331.8° / 20.2°

Aug

5731.4° / 19.4°

Sep

7627.4° / 14.9°

Oct

6921.5° / 9.1°

Nov

3714.9° / 3.6°

Dec

159.5° / -0.8°

Monthly climate evidence for Alpena — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	8.2°C	-2.4°C	66 mm	6.2	9 h 56	9	Strong coverage
February	10.7°C	-0.6°C	62 mm	5.6	10 h 48	22	Strong coverage
March	15.7°C	3.6°C	99 mm	8.4	11 h 51	38	Strong coverage
April	20.9°C	8.6°C	126 mm	8.2	13 h 04	61	Strong coverage
May	24.8°C	13.4°C	122 mm	9.2	14 h 04	77	Strong coverage
June	29.4°C	18°C	98 mm	8.1	14 h 37	64	Strong coverage
July	31.8°C	20.2°C	93 mm	7.8	14 h 24	53	Strong coverage
August	31.4°C	19.4°C	87 mm	6.3	13 h 32	57	Strong coverage
September	27.4°C	14.9°C	103 mm	6.5	12 h 22	76	Strong coverage
October	21.5°C	9.1°C	97 mm	7.2	11 h 12	69	Strong coverage
November	14.9°C	3.6°C	100 mm	6.8	10 h 11	37	Strong coverage
December	9.5°C	-0.8°C	75 mm	6.4	9 h 42	15	Strong coverage

What has changed

Alpena runs +1.1°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

+1.3

Feb

+1.4

Mar

+1.7

Apr

+0.1

May

+0.1

Jun

+1.4

Jul

+0.7

Aug

+0.1

Sep

+1.7

Oct

+0.8

Nov

+1.3

Dec

+2.5

May daytime highs, 2011–2025. Last recorded: 23.9°C.

Records at HARRISON BOONE CO AP, 1948–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	26.1°C25 Jan 1950	-25.0°C20 Jan 1985	105 mm1 Jan 1966	258 mm1949 · driest 6 mm in 2011	68
February	30.6°C12 Feb 1962	-22.7°C16 Feb 2021	91 mm23 Feb 1985	189 mm1989 · driest 10 mm in 2026	68
March	35.6°C22 Mar 2026	-22.8°C12 Mar 1948	121 mm18 Mar 2008	301 mm1973 · driest 15 mm in 1971	68
April	33.3°C18 Apr 2006	-5.6°C14 Apr 1950	113 mm22 Apr 1996	374 mm2011 · driest 14 mm in 1989	68
May	34.4°C31 May 1998	0.0°C3 May 2013	104 mm10 May 1950	327 mm1990 · driest 15 mm in 2012	68
June	41.7°C28 Jun 2012	7.8°C5 Jun 1950	111 mm18 Jun 1980	249 mm1980 · driest 12 mm in 2024	68
July	41.7°C29 Jul 1986	10.0°C22 Jul 1970	92 mm1 Jul 1968	241 mm1968 · driest 11 mm in 2006	68
August	44.4°C3 Aug 2011	8.9°C29 Aug 1986	85 mm6 Aug 1999	252 mm1981 · driest 0 mm in 2007	67
September	39.4°C1 Sep 2000	0.6°C24 Sep 1989	118 mm26 Sep 1996	289 mm1970 · driest 2 mm in 2004	67
October	33.3°C10 Oct 1963	-6.1°C31 Oct 1993	109 mm11 Oct 1969	320 mm2009 · driest 4 mm in 1964	67
November	29.4°C15 Nov 2025	-13.3°C13 Nov 1986	199 mm4 Nov 2024	366 mm2024 · driest 9 mm in 1989	67
December	29.4°C27 Dec 2025	-23.9°C23 Dec 1989	136 mm2 Dec 1982	296 mm1982 · driest 1 mm in 2025	67

Typical days per month at HARRISON BOONE CO AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	21	2	2
February	<1	0	16	2	1
March	3	<1	9	3	1
April	8	<1	2	4	<1
May	17	4	0	4	0
June	27	15	0	3	0
July	30	23	0	3	0
August	30	22	0	3	0
September	23	10	0	3	0
October	10	1	1	3	<1
November	1	0	8	3	<1
December	<1	0	18	3	<1

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 83); on 2011–2025 it is May (80). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in HARRISON BOONE CO 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	4%	20%	7%	17%	4.9–10.8°C
February	10%	22%	7%	21%	6.7–14.3°C
March	26%	26%	11%	31%	12.2–18.3°C
April	48%	28%	12%	33%	18.9–22.9°C
May	63%	30%	14%	39%	22.9–26.6°C
June	73%	27%	12%	32%	27.3–31.0°C
July	77%	23%	9%	21%	29.9–33.6°C
August	78%	22%	9%	21%	28.9–33.6°C
September	74%	22%	10%	20%	25.1–29.1°C
October	54%	22%	9%	25%	19.2–23.4°C
November	21%	22%	10%	21%	11.9–17.5°C
December	5%	21%	8%	19%	6.8–12.2°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.

1948Each stripe is one year’s mean temperature against the 66-year average. Warmest: 2012. Coolest: 1979.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4099318
NOAA station: USW00013971 · HARRISON BOONE CO AP
Station distance: 12.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 36.29°, 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 HARRISON BOONE CO AP is what differs

Harrison→Green Forest→Marble Falls→Bellefonte→Valley Springs→Batavia→

Or put two places side by side: Alpena vs Harrison

Best time to visitAlpena.

May

August

October

The whole year,without the guesswork.

Alpena runs +1.1°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Alpena.

The whole year,
without the guesswork.

Alpena runs +1.1°C
on the 1961–1990 baseline.

Nearby, measured,
and named.