Mcgrath, AK 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 Mcgrath's primary NOAA station, MCGRATH AP.
The climate verdict for Mcgrath
Winter sets the terms in Mcgrath, Alaska. A pronounced 66.6°F seasonal swing and heating demand above twice the cooling total frame an annual average of 29°F. At 34/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 2% of scores.
- 29°F
- annual average temperature (NOAA normal)
- 34/100
- comfort score, above 2% of station-mapped location scores
- 18.1"
- annual precipitation · 87" snow
- 123 days
- frost-free growing season
Mcgrath: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00026510 · Mcgrath, AK 29°F mean · 18.1" precip
TEMP-COLD · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COLD 29°F
- RANK-COOL #69
- PHOTO-FINISH ≈ Healy
- PRCP-DRY 18.1"
- SWING-WIDE 67°F
- COMF-LOW 34/100
- LOAD-HEAT 13,160 HDD
- STN-1 USW00026510
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Healy, AK ( -0.3 °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 AK station list.
- Mcgrath (this station) 29°F
- Near Healy, AK 29°F
- Near Aurora, AK 29°F
- Near College Obsy, AK 29°F
- Cold Gilmore Creek, AK 28°F
Mcgrath sits in Alaska, the #1 coldest U.S. state at 33.5°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Mcgrath
Mcgrath: 21/100 · grade F
Mcgrath publishes all six Living Index dimensions from NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals.
PlainClimate-derived for Mcgrath, not an official NOAA rating. Rankings still use Comfort Score 34/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Summer moisture balance | 47.6°F mean dew point | 80/100 · B |
| Precipitation balance | 18.1 in · 16.9 from 35 in | 40/100 · D |
| Frost-free season | 123 days/year | 8/100 · F |
| Normal heat + freeze calendar | 212 calendar days | 8/100 · F |
| Snowfall burden | 86.5 inches/year | 4/100 · F |
| Annual temperature balance | 28.9°F · 38.6° from 67.5°F | 0/100 · F |
Mcgrath · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Mcgrath is a continental Köppen climate: Dfc
Coldest-month mean -5.8°F and warmest-month mean 60.8°F place this station in continental, no dry season, cool summer climates (Dfc). Class Dfc is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, cool summer.
- Köppen code
- Dfc
- Group
- Continental
- Warmest month
- 60.8°F
- Coldest month
- -5.8°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 Mcgrath sits across the climate record
Three NOAA fields for Mcgrath's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 99%
- Among 6,861 stations, Mcgrath sits in the cooler third of annual means.
- Annual precipitation
- Drier than 76%
- Mcgrath's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 99%
- Warmest-to-coldest month gap for Mcgrath is large versus 6,861 complete station-years.
How Mcgrath compares across U.S. station-mapped locations
Mcgrath's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
34 2nd percentile score exceeds 2% 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%). This entry sits in this band.
- 40–50: 1,113 station-mapped locations (18%). Above this entry.
- 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
Mcgrath's measured station temperature trend
MethodologyAcross 83 complete annual observations from 1942 to 2025, MCGRATH AP warmed at a fitted rate of 0.28°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Mcgrath primary station fitted change +0.28 °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 | 3°F (-16°C) | -14°F (-26°C) | -6°F (-21°C) | 1.1" | 14.7" | 30.9 | 0.0 |
| February | 15°F (-10°C) | -6°F (-21°C) | 5°F (-15°C) | 0.9" | 12.7" | 27.9 | 0.0 |
| March | 25°F (-4°C) | -1°F (-18°C) | 12°F (-11°C) | 0.7" | 9.2" | 30.7 | 0.0 |
| April | 43°F (6°C) | 22°F (-6°C) | 32°F (0°C) | 0.7" | 4.4" | 26.9 | 0.0 |
| May | 59°F (15°C) | 38°F (3°C) | 48°F (9°C) | 0.9" | 0.6" | 8.7 | 0.0 |
| June | 69°F (20°C) | 49°F (9°C) | 59°F (15°C) | 1.7" | 0.0" | 0.1 | 0.1 |
| July | 70°F (21°C) | 52°F (11°C) | 61°F (16°C) | 2.5" | 0.0" | 0.0 | 0.0 |
| August | 64°F (18°C) | 48°F (9°C) | 56°F (13°C) | 2.9" | 0.0" | 0.6 | 0.0 |
| September | 54°F (12°C) | 38°F (3°C) | 46°F (8°C) | 2.5" | 1.4" | 8.9 | 0.0 |
| October | 35°F (1°C) | 22°F (-5°C) | 28°F (-2°C) | 1.5" | 7.4" | 25.7 | 0.0 |
| November | 15°F (-9°C) | 1°F (-17°C) | 8°F (-13°C) | 1.4" | 18.2" | 29.6 | 0.0 |
| December | 6°F (-15°C) | -10°F (-23°C) | -2°F (-19°C) | 1.2" | 17.9" | 31.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 71°F around June 29, short of 90°F on every date, while 212 dates carry a normal low at or below freezing, the coldest -16°F near January 8.
The freezing stretch
The normal low stays at or below 32°F into April 29, then returns to freezing around October 1, covering 212 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 August 4, when 53% of years recorded at least a hundredth of an inch. The driest is April 21 at 23%. Summed across the calendar, that is about 137 wet dates a year.
The widest day
March 16 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 Mcgrath.
Where Mcgrath Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 212 nights a year, placing this among the most frost-prone tenth of ranked stations.
Mcgrath 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: 14.7"
10.4 days with precipitation
Snow: 12.7"
9.2 days with precipitation
Snow: 9.2"
7.8 days with precipitation
Snow: 4.4"
6.7 days with precipitation
Snow: 0.6"
9.3 days with precipitation
13.1 days with precipitation
15.1 days with precipitation
16.3 days with precipitation
Snow: 1.4"
14.0 days with precipitation
Snow: 7.4"
11.9 days with precipitation
Snow: 18.2"
11.3 days with precipitation
Snow: 17.9"
12.0 days with precipitation
Mcgrath runs a summer-peaked wet season
39% of Mcgrath's yearly precipitation falls in June, July and August alone, against the 25% an evenly spread year would give those three months. The wettest month is August at 2.9", on a wide 66.6°F gap between its warmest and coldest month. Warm-season convection and, across the Southwest, the North American monsoon produce this shape: rain arrives in short heavy bursts during the hottest part of the year rather than as long cool-season soaking.
- Wettest three months: August, September, July, taking 44% of the annual total between them.
- Driest month: March at 0.7".
- Winter share: 18% falls in December, January and February.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A summer-peaked label means the June-August share reaches 35%; it describes timing across an average year, not any single season, and says nothing about how heavy an individual storm can be.
Rain reaches Mcgrath in small, frequent amounts
Mcgrath records about 137 days with measurable precipitation a year and 18.1" in total, which works out to roughly 0.13 inches on an average wet day. Precipitation on 38% 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: August, about 16 of them.
- Fewest: April, about 7.
- Average depth per wet day: 0.13 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 Mcgrath
Mcgrath averages 86.5 inches of snowfall a year, with November the snowiest month on the normals, spread across roughly 70 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: 86.5 inches of depth.
- Days recording measurable snow: about 70 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 48% 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
September 13
50% probability date
Last Spring Freeze
May 13
50% probability date
Growing Season
123 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
13,160
Higher = more heating needed
Cooling Degree Days
30
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 | 95% | 3.0 | 34% | 38% |
| February | 74% | 4.1 | 31% | 38% |
| March | 63% | 5.3 | 31% | 34% |
| April | 59% | 5.6 | 19% | 28% |
| May | 57% | 5.4 | 11% | 26% |
| June | 66% | 4.8 | 9% | 35% |
| July | 76% | 4.6 | 5% | 53% |
| August | 77% | 4.5 | 12% | 41% |
| September | 77% | 4.9 | 18% | 47% |
| October | 83% | 3.6 | 19% | 54% |
| November | 86% | 2.6 | 26% | 47% |
| December | 97% | 2.5 | 30% | 40% |
Nationwide similar cities
Other rankable U.S. places outside AK closest to Mcgrath 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 (29°F here).
- Cooke City, MT 34°F · 5.3°F off
- Crested Butte, CO 34°F · 5.3°F off
- Silver Gate, MT 34°F · 5.4°F off
- Stanley, ID 34°F · 5.5°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (18.1" here), excluding temperature-peer places.
- Brownfield, TX 18.1" · 0.0" off
- Dayton, WY 18.0" · 0.0" off
- Underwood, ND 18.0" · 0.0" off
- Ardmore, SD 18.1" · 0.0" off
Snow and freeze rhythm
When cold and snow define Mcgrath
heating led · dry · high swing
Winter and seasonal range jointly define this record. Mcgrath logs 13,160 heating degree days, more than twice its 30 cooling total, while the typical coldest-to-warmest-month gap reaches 66.6°F. The annual mean therefore compresses two materially different seasons.
Only about 123 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. Mcgrath coldest normal
January
Averaging -6°F (-21°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Mcgrath typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Mcgrath snow peak
November
Mcgrath averages 86.5 inches of snow a year, with November the snowiest month on the normals.
Questions about Mcgrath's climate
How much snow does Mcgrath get? ▼
How cold does Mcgrath get in winter? ▼
How much energy does heating and cooling require in Mcgrath? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Mcgrath's primary station: MCGRATH AP (USW00026510). 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 0246010). Match rule for Mcgrath: 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 Mcgrath 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.