Mullan, ID 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 Mullan's primary NOAA station, MULLAN.
The climate verdict for Mullan
Mullan, Idaho has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 45°F. Its climate comfort score of 64/100 (good) lands mid-pack nationally, exceeding 49% of station-mapped location scores.
- 45°F
- annual average temperature (NOAA normal)
- 64/100
- comfort score, above 49% of station-mapped location scores
- 36.6"
- annual precipitation
- 141 days
- frost-free growing season
Mullan: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00106230 · Mullan, ID 45°F mean · 36.6" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 45°F
- RANK-COOL #1,304
- PHOTO-FINISH ≈ Middle Fork Lod…
- PRCP-MID 36.6"
- SWING-MID 38°F
- COMF-MID 64/100
- LOAD-HEAT 7,417 HDD
- STN-1 USC00106230
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Middle Fork Lodge, ID (+ 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 ID station list.
- Mullan (this station) 45°F
- Hot Gibbs Rch - Jar…, NV 45°F
- Near Middle Fork Lod…, ID 45°F
- Near Deer Creek Dam, UT 45°F
- Near Black Canyon of…, CO 45°F
Climate Living Index · Mullan
Mullan: 37/100 · grade F
Mullan publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Mullan, not an official NOAA rating. Rankings still use Comfort Score 64/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 36.6 in · 1.6 from 35 in | 93/100 · A |
| Normal heat + freeze calendar | 176 calendar days | 28/100 · F |
| Annual temperature balance | 45.1°F · 22.4° from 67.5°F | 20/100 · F |
| Frost-free season | 141 days/year | 19/100 · F |
Mullan · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Mullan is a continental Köppen climate: Dsb
Coldest-month mean 27.2°F and warmest-month mean 65.0°F place this station in continental, dry-summer, warm summer climates (Dsb). Class Dsb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, dry-summer, warm summer.
- Köppen code
- Dsb
- Group
- Continental
- Warmest month
- 65.0°F
- Coldest month
- 27.2°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 Mullan sits across the climate record
Three NOAA fields for Mullan's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 81%
- Among 6,861 stations, Mullan sits in the cooler third of annual means.
- Annual precipitation
- 51st percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 74%
- Warmest-to-coldest month gap for Mullan is compact versus 6,861 complete station-years.
How Mullan compares across U.S. station-mapped locations
Mullan's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
64 49th percentile score exceeds 49% 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%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 35°F (2°C) | 23°F (-5°C) | 29°F (-2°C) | 4.1" | 28.7 | 0.0 |
| February | 39°F (4°C) | 22°F (-5°C) | 31°F (-1°C) | 3.5" | 24.0 | 0.0 |
| March | 46°F (8°C) | 27°F (-3°C) | 37°F (3°C) | 4.5" | 25.4 | 0.0 |
| April | 55°F (13°C) | 32°F (0°C) | 44°F (6°C) | 3.0" | 13.5 | 0.0 |
| May | 65°F (19°C) | 40°F (5°C) | 53°F (12°C) | 2.5" | 3.2 | 0.1 |
| June | 71°F (22°C) | 45°F (7°C) | 58°F (15°C) | 3.0" | 0.3 | 0.8 |
| July | 81°F (27°C) | 49°F (10°C) | 65°F (18°C) | 0.9" | 0.1 | 4.2 |
| August | 81°F (27°C) | 48°F (9°C) | 65°F (18°C) | 1.0" | 0.1 | 4.6 |
| September | 71°F (22°C) | 42°F (5°C) | 56°F (13°C) | 1.6" | 2.2 | 0.5 |
| October | 55°F (13°C) | 34°F (1°C) | 44°F (7°C) | 3.9" | 13.2 | 0.0 |
| November | 41°F (5°C) | 27°F (-3°C) | 34°F (1°C) | 4.7" | 23.1 | 0.0 |
| December | 32°F (0°C) | 22°F (-5°C) | 27°F (-3°C) | 3.8" | 28.7 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 85°F around July 30, short of 90°F on every date, while 176 dates carry a normal low at or below freezing, the coldest 21°F near December 22.
The freezing stretch
The normal low stays at or below 32°F into April 14, then returns to freezing around October 22, covering 176 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.
The widest day
July 31 carries the biggest normal gap between afternoon and dawn, 34°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Mullan.
Where Mullan Stands Nationally
Daily temperature swings run wider than most of the country, peaking near 34°F between the normal high and low.
Mullan 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
Mullan spreads its precipitation across the year
Neither half of the year dominates here: June through August take 13% of the annual total and December through February 31%, with neither reaching the 35% that would mark a distinct wet season. Mullan has no dry season to plan around, though it does carry a 37.8°F seasonal spread.
The gap between the wettest and driest month still matters: November averages 4.7" and July 0.9". The three wettest months together take 36% 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.
Frost Dates & Growing Season
First Fall Freeze
September 30
50% probability date
Last Spring Freeze
May 12
50% probability date
Growing Season
141 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,417
Higher = more heating needed
Cooling Degree Days
202
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside ID closest to Mullan 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 (45°F here).
- Alfred, NY 45°F · 0.0°F off
- Big Sandy, MT 45°F · 0.0°F off
- Bradford, NH 45°F · 0.0°F off
- Brady, MT 45°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (36.6" here), excluding temperature-peer places.
- Batavia, NY 36.6" · 0.0" off
- Des Moines, IA 36.5" · 0.0" off
- Kingfisher, OK 36.5" · 0.0" off
- San Marcos, TX 36.5" · 0.0" off
Data-derived climate profile
How Mullan's climate pattern fits together
heating led · moderate · mid swing
Mullan's energy balance leans toward cold weather: 7,417 annual heating degree days against 202 for cooling. Its 37.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 141 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.
July and December mark the typical warm and cold ends of the calendar in Mullan's middle-range seasonal profile. The measured spread is 37.8°F. The annual average is 45°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Mullan's 36.6 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Mullan's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Mullan, not an official NOAA class or a year-ahead forecast.
Questions about Mullan's climate
How much rain does Mullan get? ▼
How cold does Mullan get in winter? ▼
How much energy does heating and cooling require in Mullan? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Mullan's primary station: MULLAN (USC00106230). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 1655630). Match rule for Mullan: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Mullan 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.