Mud Mtn Dam, WA Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Mud Mtn Dam's primary NOAA station, MUD MTN DAM.
The climate verdict for Mud Mtn Dam
Water is the standout signal in Mud Mtn Dam, Washington: 60.1 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 50°F. At 45/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 16% of scores.
- 50°F
- annual average temperature (NOAA normal)
- 45/100
- comfort score, above 16% of station-mapped location scores
- 60.1"
- yearly precipitation total
- 196 days
- growing season, frost-free days
Mud Mtn Dam: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00455704 · Mud Mtn Dam, WA 50°F mean · 60.1" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-WET · SWING-NARROW · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 50°F
- RANK-COOL #2,676
- PHOTO-FINISH ≈ Corvallis Water…
- PRCP-WET 60.1"
- SWING-NARROW 25°F
- COMF-LOW 45/100
- LOAD-HEAT 5,652 HDD
- STN-1 USC00455704
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Corvallis Water Bureau, OR ( -0.1 °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 WA station list.
- Mud Mtn Dam (this station) 50°F
- Cold Baring, WA 50°F
- Hot Three Lynx, OR 50°F
- Near Corvallis Water…, OR 50°F
- Near Darrington, WA 50°F
Climate Living Index · Mud Mtn Dam
Mud Mtn Dam: 57/100 · grade C
Mud Mtn Dam publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Mud Mtn Dam, not an official NOAA rating. Rankings still use Comfort Score 45/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Frost-free season | 196 days/year | 61/100 · C |
| Annual temperature balance | 49.9°F · 17.6° from 67.5°F | 40/100 · D |
| Precipitation balance | 60.1 in · 25.1 from 35 in | 12/100 · F |
Mud Mtn Dam · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Mud Mtn Dam is a temperate Köppen climate: Csb
Coldest-month mean 38.6°F and warmest-month mean 63.9°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 63.9°F
- Coldest month
- 38.6°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 Mud Mtn Dam sits across the climate record
Three NOAA fields for Mud Mtn Dam's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 39th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 5% wettest
- Mud Mtn Dam's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 94%
- Warmest-to-coldest month gap for Mud Mtn Dam is compact versus 6,861 complete station-years.
How Mud Mtn Dam compares across U.S. station-mapped locations
Mud Mtn Dam's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
45 16th percentile score exceeds 16% 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
Mud Mtn Dam's measured station temperature trend
MethodologyAcross 71 complete annual observations from 1940 to 2025, MUD MTN DAM warmed at a fitted rate of 0.15°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Mud Mtn Dam primary station fitted change +0.15 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 46°F (8°C) | 33°F (1°C) | 39°F (4°C) | 7.0" | 15.4 | 0.0 |
| February | 47°F (9°C) | 33°F (1°C) | 40°F (5°C) | 5.2" | 14.4 | 0.0 |
| March | 51°F (10°C) | 35°F (2°C) | 43°F (6°C) | 6.6" | 12.7 | 0.0 |
| April | 56°F (13°C) | 38°F (3°C) | 47°F (8°C) | 5.6" | 5.7 | 0.0 |
| May | 63°F (17°C) | 44°F (6°C) | 53°F (12°C) | 5.0" | 1.2 | 0.0 |
| June | 67°F (20°C) | 48°F (9°C) | 58°F (14°C) | 3.9" | 0.0 | 0.4 |
| July | 75°F (24°C) | 52°F (11°C) | 63°F (17°C) | 1.5" | 0.0 | 1.4 |
| August | 76°F (24°C) | 52°F (11°C) | 64°F (18°C) | 1.6" | 0.0 | 0.9 |
| September | 70°F (21°C) | 48°F (9°C) | 59°F (15°C) | 3.4" | 0.1 | 0.3 |
| October | 59°F (15°C) | 42°F (6°C) | 51°F (10°C) | 6.0" | 2.6 | 0.0 |
| November | 50°F (10°C) | 36°F (2°C) | 43°F (6°C) | 8.0" | 10.1 | 0.0 |
| December | 45°F (7°C) | 33°F (0°C) | 39°F (4°C) | 6.3" | 17.2 | 0.0 |
The year, day by day
The calendar barely moves in Mud Mtn Dam: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 32°F near December 15 and 77°F near July 28.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 32°F around December 15.
The widest day
August 28 carries the biggest normal gap between afternoon and dawn, 23°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Mud Mtn Dam.
Where Mud Mtn Dam Stands Nationally
This is one of the wettest normals climates ranked: about 60 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Mud Mtn Dam 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
Mud Mtn Dam spreads its precipitation across the year
Neither half of the year dominates here: June through August take 12% of the annual total and December through February 31%, with neither reaching the 35% that would mark a distinct wet season. Mud Mtn Dam has no dry season to plan around, though it does carry an unusually narrow 25.3°F seasonal spread.
The gap between the wettest and driest month still matters: November averages 8.0" and July 1.5". 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
October 31
50% probability date
Last Spring Freeze
April 18
50% probability date
Growing Season
196 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,652
Higher = more heating needed
Cooling Degree Days
153
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside WA closest to Mud Mtn Dam 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 (50°F here).
- Cedar Rapids, IA 50°F · 0.0°F off
- Centerville, IA 50°F · 0.0°F off
- Chalmers, IN 50°F · 0.0°F off
- Davenport, IA 50°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (60.1" here), excluding temperature-peer places.
- Natchez, MS 60.1" · 0.0" off
- Hackberry, LA 60.1" · 0.0" off
- Wilmington, NC 60.1" · 0.0" off
- Rockford, AL 60.2" · 0.1" off
Data-derived climate profile
How Mud Mtn Dam's climate pattern fits together
heating led · wet · low swing
Heating is the larger measured load in Mud Mtn Dam, at 5,652 degree days versus 153 for cooling. Unlike a strongly continental record, however, its 25.3°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Mud Mtn Dam's frost-free season lasts about 196 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
Mud Mtn Dam's 25.3°F seasonal spread is compact even though precipitation is abundant. August and December mark the typical warm and cold ends of the calendar. The annual average is 50°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
Alongside its heating load, Mud Mtn Dam carries 60.1 inches of precipitation in a normal year, inside PlainClimate's wet range. Snowfall is not added to the interpretation because its annual value is missing. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Mud Mtn Dam'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 Mud Mtn Dam, not an official NOAA class or a year-ahead forecast.
Questions about Mud Mtn Dam's climate
How much rain does Mud Mtn Dam get? ▼
How much energy does heating and cooling require in Mud Mtn Dam? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Mud Mtn Dam's primary station: MUD MTN DAM (USC00455704). 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 Mud Mtn Dam; 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 Mud Mtn Dam 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.