Alpena County Rgnl, MI Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Alpena County Rgnl's primary NOAA station, ALPENA CO RGNL AP.
The climate verdict for Alpena County Rgnl
Alpena County Rgnl, Michigan has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 44°F. At 44/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 10% of scores.
- 44°F
- average temperature, NOAA 1991-2020 normal
- 44/100
- comfort score, above 10% of station-mapped location scores
- 29.7"
- annual precipitation · 78" snow
- 137 days
- growing season, frost-free days
Alpena County Rgnl: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00094849 · Alpena County Rgnl, MI 44°F mean · 29.7" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 44°F
- RANK-COOL #1,098
- PHOTO-FINISH ≈ Wentworth
- PRCP-MID 29.7"
- SWING-WIDE 48°F
- COMF-LOW 44/100
- LOAD-HEAT 7,844 HDD
- STN-1 USW00094849
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Wentworth, NH (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every MI station list.
- Alpena County R… (this station) 44°F
- Hot Cadillac 9&10 N…, MI 44°F
- Near Wentworth, NH 44°F
- Near W Branch, MI 44°F
- Near Newport, NH 44°F
Climate Living Index · Alpena County Rgnl
Alpena County Rgnl: 39/100 · grade F
Alpena County Rgnl publishes all six Living Index dimensions from NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals.
PlainClimate-derived for Alpena County Rgnl, not an official NOAA rating. Rankings still use Comfort Score 44/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Summer moisture balance | 56.9°F mean dew point | 83/100 · B |
| Precipitation balance | 29.7 in · 5.3 from 35 in | 81/100 · B |
| Normal heat + freeze calendar | 170 calendar days | 32/100 · F |
| Annual temperature balance | 44.3°F · 23.2° from 67.5°F | 17/100 · F |
| Frost-free season | 137 days/year | 17/100 · F |
| Snowfall burden | 77.6 inches/year | 7/100 · F |
Alpena County Rgnl · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Alpena County Rgnl is a continental Köppen climate: Dfb
Coldest-month mean 20.0°F and warmest-month mean 68.2°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 68.2°F
- Coldest month
- 20.0°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Alpena County Rgnl sits across the climate record
Three NOAA fields for Alpena County Rgnl's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 84%
- Among 6,861 stations, Alpena County Rgnl sits in the cooler third of annual means.
- Annual precipitation
- 40th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 74%
- Warmest-to-coldest month gap for Alpena County Rgnl is large versus 6,861 complete station-years.
How Alpena County Rgnl compares across U.S. station-mapped locations
Alpena County Rgnl's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 10th percentile score exceeds 10% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Alpena County Rgnl's measured station temperature trend
MethodologyAcross 97 complete annual observations from 1918 to 2025, ALPENA CO RGNL AP warmed at a fitted rate of 0.16°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Alpena County Rgnl primary station fitted change +0.16 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 28°F (-2°C) | 12°F (-11°C) | 20°F (-7°C) | 1.8" | 19.3" | 29.8 | 0.0 |
| February | 30°F (-1°C) | 11°F (-12°C) | 21°F (-6°C) | 1.5" | 17.0" | 27.2 | 0.0 |
| March | 39°F (4°C) | 19°F (-7°C) | 29°F (-1°C) | 1.8" | 10.6" | 28.0 | 0.0 |
| April | 52°F (11°C) | 30°F (-1°C) | 41°F (5°C) | 2.9" | 6.6" | 19.1 | 0.0 |
| May | 66°F (19°C) | 41°F (5°C) | 53°F (12°C) | 2.8" | 0.2" | 5.0 | 0.3 |
| June | 76°F (24°C) | 50°F (10°C) | 63°F (17°C) | 2.7" | 0.0" | 0.1 | 2.0 |
| July | 81°F (27°C) | 56°F (13°C) | 68°F (20°C) | 3.2" | 0.0" | 0.0 | 2.9 |
| August | 79°F (26°C) | 55°F (13°C) | 67°F (19°C) | 3.1" | 0.0" | 0.0 | 1.5 |
| September | 71°F (22°C) | 47°F (8°C) | 59°F (15°C) | 2.8" | 0.0" | 1.0 | 0.5 |
| October | 58°F (14°C) | 37°F (3°C) | 47°F (9°C) | 3.0" | 0.4" | 9.9 | 0.0 |
| November | 45°F (7°C) | 29°F (-2°C) | 37°F (3°C) | 2.1" | 6.6" | 20.7 | 0.0 |
| December | 34°F (1°C) | 20°F (-7°C) | 27°F (-3°C) | 1.9" | 16.9" | 28.2 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 81°F around July 19, short of 90°F on every date, while 170 dates carry a normal low at or below freezing, the coldest 10°F near January 30.
The freezing stretch
The normal low stays at or below 32°F into April 20, then returns to freezing around November 3, covering 170 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is January 11, when 49% of years recorded at least a hundredth of an inch. The driest is August 13 at 32%. Summed across the calendar, that is about 146 wet dates a year.
The widest day
June 6 carries the biggest normal gap between afternoon and dawn, 26°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Alpena County Rgnl.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 19.3"
15.6 days with precipitation
Snow: 17.0"
11.8 days with precipitation
Snow: 10.6"
11.0 days with precipitation
Snow: 6.6"
11.5 days with precipitation
Snow: 0.2"
11.7 days with precipitation
10.4 days with precipitation
10.9 days with precipitation
9.6 days with precipitation
11.2 days with precipitation
Snow: 0.4"
13.9 days with precipitation
Snow: 6.6"
13.8 days with precipitation
Snow: 16.9"
14.0 days with precipitation
Alpena County Rgnl spreads its precipitation across the year
Neither half of the year dominates here: June through August take 30% of the annual total and December through February 18%, with neither reaching the 35% that would mark a distinct wet season. Alpena County Rgnl has no dry season to plan around, though it does carry a wide 48.2°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: July averages 3.2" and February 1.5". The three wettest months together take 31% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How Alpena County Rgnl's precipitation splits across the calendar
About 145 days a year record measurable precipitation here, carrying 29.7" between them, or roughly 0.20 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Winter brings real snow to Alpena County Rgnl
Alpena County Rgnl averages 77.6 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 56 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 77.6 inches of depth.
- Days recording measurable snow: about 56 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 26% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 1
50% probability date
Last Spring Freeze
May 17
50% probability date
Growing Season
137 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,844
Higher = more heating needed
Cooling Degree Days
353
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 76% | 7.8 | 22% | 58% |
| February | 74% | 8.0 | 32% | 50% |
| March | 67% | 8.4 | 40% | 40% |
| April | 62% | 8.1 | 49% | 30% |
| May | 68% | 6.9 | 51% | 24% |
| June | 70% | 6.3 | 50% | 19% |
| July | 73% | 5.9 | 49% | 15% |
| August | 76% | 6.0 | 50% | 19% |
| September | 77% | 6.9 | 42% | 31% |
| October | 76% | 7.6 | 30% | 50% |
| November | 78% | 8.0 | 17% | 68% |
| December | 79% | 8.0 | 15% | 69% |
Nationwide similar cities
Other rankable U.S. places outside MI closest to Alpena County Rgnl on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (44°F here).
- Gettysburg, SD 44°F · 0.0°F off
- Harrold, SD 44°F · 0.0°F off
- Jim Falls, WI 44°F · 0.0°F off
- Kewaunee, WI 44°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (29.7" here), excluding temperature-peer places.
- Cambridge, MN 29.7" · 0.0" off
- Salina, KS 29.7" · 0.0" off
- Breckenridge, TX 29.7" · 0.0" off
- Lytle, TX 29.6" · 0.1" off
Snow and freeze rhythm
When cold and snow define Alpena County Rgnl
heating led · moderate · mid swing
Alpena County Rgnl's energy balance leans toward cold weather: 7,844 annual heating degree days against 353 for cooling. Its 48.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 137 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
-
1. Alpena County Rgnl coldest normal
January
Averaging 20°F (-7°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Alpena County Rgnl typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Alpena County Rgnl snow peak
January
Alpena County Rgnl averages 77.6 inches of snow a year, with January the snowiest month on the normals.
Questions about Alpena County Rgnl's climate
How much snow does Alpena County Rgnl get? ▼
How cold does Alpena County Rgnl get in winter? ▼
How much energy does heating and cooling require in Alpena County Rgnl? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Alpena County Rgnl's primary station: ALPENA CO RGNL AP (USW00094849). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Alpena County Rgnl; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Alpena County Rgnl comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.