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Alpena, Michigan climate

Dfb Warm-summer humid continental

Alpena has a strongly seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 25°C, while the coldest is January averaging around −10°C at night. Around 811 mm of precipitation falls each year, peaking in August (88 mm) and easing off in February (43 mm). Winters bring significant snowfall (151 cm of snow per year on average).

☀️ Summers

Mild

Highs near 25°C in July.

About 4 days a year above 32 °C

❄️ Winters

Very cold

Lows near −10°C in January.

About 145 freezing nights a year

🌧️ Rain & snow

Moderate rainfall

About 811 mm of rain a year, plus 151 cm of snow.

Snow falls through the winter months

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

+0.0 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Alpena climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	−3	−2	3	9	16	22	25	25	21	13	6	0
Avg temp (°C)	−7	−6	−2	5	11	17	20	20	15	9	2	−3
Avg low (°C)	−10	−11	−6	0	6	12	15	15	10	4	−1	−6
Precipitation (mm)	56	43	46	79	81	69	84	88	75	82	58	52
Snowfall (cm)	40	37	16	9	—	—	—	—	—	0	8	42

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	−3	−2	3	9	16	22
Avg temp (°C)	−7	−6	−2	5	11	17
Avg low (°C)	−10	−11	−6	0	6	12
Precipitation (mm)	56	43	46	79	81	69
Snowfall (cm)	40	37	16	9	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	25	25	21	13	6	0
Avg temp (°C)	20	20	15	9	2	−3
Avg low (°C)	15	15	10	4	−1	−6
Precipitation (mm)	84	88	75	82	58	52
Snowfall (cm)	—	—	—	0	8	42

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	19	15	13	13	14	12	12	12	13	16	16	17
Days with high ≥ 32°C (days)	—	—	—	—	0.1	1.0	2	1	0.2	—	—	—
Days with low ≤ 0°C (days)	29	27	26	13	1	—	0.0	—	0.2	5	17	27
Days with snowfall ≥ 2.5 cm (days)	5	4	2	1	—	—	—	—	—	0.1	1	4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	19	15	13	13	14	12
Days with high ≥ 32°C (days)	—	—	—	—	0.1	1.0
Days with low ≤ 0°C (days)	29	27	26	13	1	—
Days with snowfall ≥ 2.5 cm (days)	5	4	2	1	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	12	12	13	16	16	17
Days with high ≥ 32°C (days)	2	1	0.2	—	—	—
Days with low ≤ 0°C (days)	0.0	—	0.2	5	17	27
Days with snowfall ≥ 2.5 cm (days)	—	—	—	0.1	1	4

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	80	75	70	78	78	77	70	67	65	73	81	81
Relative humidity (%)	89	87	83	81	84	85	81	79	78	79	81	85
Wind speed (km/h)	22.8	21.3	18.6	16.8	12.9	11.1	11.9	13.9	16.4	19.6	21.6	22.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	80	75	70	78	78	77
Relative humidity (%)	89	87	83	81	84	85
Wind speed (km/h)	22.8	21.3	18.6	16.8	12.9	11.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	70	67	65	73	81	81
Relative humidity (%)	81	79	78	79	81	85
Wind speed (km/h)	11.9	13.9	16.4	19.6	21.6	22.4

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Alpena Wwtp (NOAA GHCN station USW00014814), inside the city.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →