Alpena Wwtp, MI Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Alpena Wwtp's primary NOAA station, ALPENA WWTP.
The climate verdict for Alpena Wwtp
Alpena Wwtp, 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
- annual average temperature (NOAA normal)
- 44/100
- comfort score, above 10% of station-mapped location scores
- 31.9"
- annual precipitation · 59" snow
- 165 days
- growing season, frost-free days
Alpena Wwtp: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00014814 · Alpena Wwtp, MI 44°F mean · 31.9" 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 ≈ N Hartland Lake
- PRCP-MID 31.9"
- SWING-WIDE 48°F
- COMF-LOW 44/100
- LOAD-HEAT 7,877 HDD
- STN-1 USW00014814
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: N Hartland Lake, VT (+ 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 Wwtp (this station) 44°F
- Cold Houghton LK Ros…, MI 44°F
- Hot W Branch, MI 44°F
- Near N Hartland Lake, VT 44°F
- Near Wellston, MI 44°F
Climate Living Index · Alpena Wwtp
Alpena Wwtp: 39/100 · grade F
Alpena Wwtp publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Alpena Wwtp, not an official NOAA rating. Rankings still use Comfort Score 44/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 31.9 in · 3.1 from 35 in | 89/100 · A |
| Normal heat + freeze calendar | 159 calendar days | 40/100 · D |
| Frost-free season | 165 days/year | 38/100 · F |
| Annual temperature balance | 44.2°F · 23.3° from 67.5°F | 17/100 · F |
| Snowfall burden | 59.4 inches/year | 16/100 · F |
Alpena Wwtp · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Alpena Wwtp is a continental Köppen climate: Dfb
Coldest-month mean 20.2°F and warmest-month mean 68.3°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
- 68.3°F
- Coldest month
- 20.2°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 Wwtp sits across the climate record
Three NOAA fields for Alpena Wwtp'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 Wwtp sits in the cooler third of annual means.
- Annual precipitation
- 43rd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 73%
- Warmest-to-coldest month gap for Alpena Wwtp is large versus 6,861 complete station-years.
How Alpena Wwtp compares across U.S. station-mapped locations
Alpena Wwtp'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 Wwtp's measured station temperature trend
MethodologyAcross 93 complete annual observations from 1916 to 2025, ALPENA WWTP warmed at a fitted rate of 0.21°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Alpena Wwtp primary station fitted change +0.21 °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 | 27°F (-3°C) | 13°F (-10°C) | 20°F (-7°C) | 2.2" | 15.6" | 29.8 | 0.0 |
| February | 29°F (-2°C) | 13°F (-11°C) | 21°F (-6°C) | 1.7" | 14.4" | 27.3 | 0.0 |
| March | 37°F (3°C) | 21°F (-6°C) | 29°F (-2°C) | 1.8" | 6.2" | 26.6 | 0.0 |
| April | 48°F (9°C) | 32°F (0°C) | 40°F (5°C) | 3.1" | 3.5" | 13.3 | 0.0 |
| May | 61°F (16°C) | 43°F (6°C) | 52°F (11°C) | 3.2" | 0.0" | 1.3 | 0.1 |
| June | 71°F (22°C) | 54°F (12°C) | 62°F (17°C) | 2.7" | 0.0" | 0.0 | 1.0 |
| July | 77°F (25°C) | 59°F (15°C) | 68°F (20°C) | 3.3" | 0.0" | 0.0 | 1.7 |
| August | 76°F (25°C) | 58°F (15°C) | 67°F (20°C) | 3.5" | 0.0" | 0.0 | 1.0 |
| September | 69°F (21°C) | 51°F (10°C) | 60°F (15°C) | 2.9" | 0.0" | 0.2 | 0.2 |
| October | 56°F (13°C) | 40°F (4°C) | 48°F (9°C) | 3.2" | 0.1" | 5.6 | 0.0 |
| November | 43°F (6°C) | 30°F (-1°C) | 36°F (2°C) | 2.3" | 3.0" | 17.9 | 0.0 |
| December | 33°F (0°C) | 21°F (-6°C) | 27°F (-3°C) | 2.0" | 16.6" | 27.3 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 78°F around July 22, short of 90°F on every date, while 159 dates carry a normal low at or below freezing, the coldest 11°F near February 2.
The freezing stretch
The normal low stays at or below 32°F into April 15, then returns to freezing around November 9, covering 159 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 10, when 63% of years recorded at least a hundredth of an inch. The driest is August 16 at 39%. Summed across the calendar, that is about 176 wet dates a year.
The widest day
September 2 carries the biggest normal gap between afternoon and dawn, 18°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Alpena Wwtp.
Where Alpena Wwtp Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 18°F.
Alpena Wwtp earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 15.6"
19.8 days with precipitation
Snow: 14.4"
15.5 days with precipitation
Snow: 6.2"
13.0 days with precipitation
Snow: 3.5"
13.7 days with precipitation
14.1 days with precipitation
12.2 days with precipitation
12.4 days with precipitation
12.0 days with precipitation
12.9 days with precipitation
Snow: 0.1"
16.6 days with precipitation
Snow: 3.0"
16.1 days with precipitation
Snow: 16.6"
17.3 days with precipitation
Alpena Wwtp 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 19%, with neither reaching the 35% that would mark a distinct wet season. Alpena Wwtp has no dry season to plan around, though it does carry a wide 48.1°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: August averages 3.5" and February 1.7". 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.
Rain reaches Alpena Wwtp in small, frequent amounts
Alpena Wwtp records about 176 days with measurable precipitation a year and 31.9" in total, which works out to roughly 0.18 inches on an average wet day. Precipitation on 48% of all days, arriving that lightly, is the damp many-grey-days pattern rather than the storm-driven one.
Places in this band read as wetter than their annual totals suggest, because what people notice is the number of overcast days, not the depth in the gauge.
- Most wet days: January, about 20 of them.
- Fewest: August, about 12.
- Average depth per wet day: 0.18 inches.
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 Wwtp
Alpena Wwtp averages 59.4 inches of snowfall a year, with December the snowiest month on the normals, spread across roughly 30 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: 59.4 inches of depth.
- Days recording measurable snow: about 30 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 19% 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 17
50% probability date
Last Spring Freeze
May 5
50% probability date
Growing Season
165 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,877
Higher = more heating needed
Cooling Degree Days
336
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MI closest to Alpena Wwtp 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).
- Andover, SD 44°F · 0.0°F off
- Greer, AZ 44°F · 0.0°F off
- Jordan, MT 44°F · 0.0°F off
- Jordan, MN 44°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (31.9" here), excluding temperature-peer places.
- Beeville, TX 31.9" · 0.0" off
- Bloomer, WI 31.9" · 0.0" off
- Aitkin, MN 31.9" · 0.0" off
- Sioux Rapids, IA 32.0" · 0.0" off
Snow and freeze rhythm
When cold and snow define Alpena Wwtp
heating led · moderate · mid swing
Alpena Wwtp's energy balance leans toward cold weather: 7,877 annual heating degree days against 336 for cooling. Its 48.1°F seasonal range still makes the monthly rows more useful than the annual average alone.
Alpena Wwtp's frost-free season lasts about 165 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Alpena Wwtp coldest normal
January
Averaging 20°F (-7°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Alpena Wwtp typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Alpena Wwtp snow peak
December
Alpena Wwtp averages 59.4 inches of snow a year, with December the snowiest month on the normals.
Questions about Alpena Wwtp's climate
How much snow does Alpena Wwtp get? ▼
How cold does Alpena Wwtp get in winter? ▼
How much energy does heating and cooling require in Alpena Wwtp? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Alpena Wwtp's primary station: ALPENA WWTP (USW00014814). 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 Wwtp; 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 Wwtp 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.