Sutton (1 mi W), Alaska climate: Climate normals at a NOAA weather station
Sutton (1 mi W)'s normal year runs from 9°F January nights to 69°F July afternoons, with 18.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 2.5°C, January lows of −13°C, July highs of 20°C, 478 mm of precipitation a year.
- NOAA stationSutton (1 mi W)
- Station IDUSC00508915
- Location61.71°N 148.91°W
- Elevation550 ft (168 m)
On October 23, the normal high in Sutton (1 mi W) is 40°F and the normal low 24°F, and the chance of measurable rain or snow is 26%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Sutton (1 mi W).
- Jan 23° 9°
- Feb 30° 12°
- Mar 36° 16°
- Apr 50° 26°
- May 62° 33°
- Jun 67° 42°
- Jul 69° 47°
- Aug 66° 45°
- Sep 57° 37°
- Oct 44° 27°
- Nov 29° 15°
- Dec 24° 11°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Sutton (1 mi W) each month?
July is the warmest month, with normal highs of 69°F; January the coldest, with normal lows of 9°F. The most precipitation falls in September (3.31 in), the least in April (0.50 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 23°F | 9°F | 15.7°F | 0.90 | 7 | <1 | 31 | 6 h 10 min |
| February | 30°F | 12°F | 20.9°F | 1.22 | 5 | <1 | 28 | 8 h 50 min |
| March | 36°F | 16°F | 26.4°F | 0.72 | 5 | <1 | 30 | 11 h 40 min |
| April | 50°F | 26°F | 37.7°F | 0.50 | 4 | <1 | 27 | 14 h 40 min |
| May | 62°F | 33°F | 47.4°F | 0.85 | 8 | <1 | 16 | 17 h 30 min |
| June | 67°F | 42°F | 54.5°F | 1.45 | 11 | <1 | 2 | 19 h 30 min |
| July | 69°F | 47°F | 57.8°F | 2.30 | 17 | <1 | <1 | 18 h 40 min |
| August | 66°F | 45°F | 55.2°F | 3.19 | 18 | <1 | 1 | 16 h |
| September | 57°F | 37°F | 46.9°F | 3.31 | 16 | <1 | 9 | 13 h |
| October | 44°F | 27°F | 35.3°F | 1.53 | 8 | <1 | 24 | 10 h 10 min |
| November | 29°F | 15°F | 22.2°F | 1.42 | 7 | <1 | 29 | 7 h 20 min |
| December | 24°F | 11°F | 17.5°F | 1.41 | 8 | <1 | 31 | 5 h 20 min |
| Year (annual) | 46°F | 27°F | 36.5°F | 18.80 | 115 | <1 | 227 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −5°C | −13°C | −9.1°C | 23 mm |
| February | −1°C | −11°C | −6.2°C | 31 mm |
| March | 2°C | −9°C | −3.1°C | 18 mm |
| April | 10°C | −4°C | 3.2°C | 13 mm |
| May | 16°C | 1°C | 8.6°C | 22 mm |
| June | 19°C | 6°C | 12.5°C | 37 mm |
| July | 20°C | 8°C | 14.3°C | 58 mm |
| August | 19°C | 7°C | 12.9°C | 81 mm |
| September | 14°C | 3°C | 8.3°C | 84 mm |
| October | 7°C | −3°C | 1.8°C | 39 mm |
| November | −2°C | −9°C | −5.4°C | 36 mm |
| December | −4°C | −12°C | −8.1°C | 36 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Lazy Mountain (7 miles away), gets 83 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00508915; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Sutton (1 mi W)?
Normal highs sit between 65°F and 85°F in June, July and August. Of those, June has the fewest days with rain (11).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00508915.
When is the last frost at Sutton (1 mi W)?
In Sutton (1 mi W), the last spring frost (32°F) comes after June 1 in half of years and after June 13 in one year in ten; the first autumn frost comes before September 6 in half of years and before August 24 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- June 11 year in 10 after June 13; 9 in 10 after May 20
- First autumn frost, half of years before
- September 61 year in 10 before August 24; 9 in 10 before September 20
NOAA puts the median frost-free season at 98 days, and the season without a hard freeze (28°F) at 125 days.
A hard freeze (28°F) comes after May 18 in half of springs and before September 21 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Sutton (1 mi W) in zone 5a in ZIP code 99645, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 4a: the coldest night of a typical year reaches −26°F (19 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Alaska · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00508915; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Sutton (1 mi W)?
In a normal year in Sutton (1 mi W), a 90°F day is rare, 227 nights fall to 32°F or colder and 115 days bring measurable precipitation.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 227a normal year
- Days that stay below freezing
- 100high of 32°F or less
- Days with 0.01 inch of precipitation
- 115a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00508915.
How sunny is it at Sutton (1 mi W)?
Over a year 64% of the sunlight that would reach the ground under clear skies gets through the clouds at Sutton (1 mi W), 2.5 kWh per square metre a day. April is the sunniest month (70%) and October the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 57% | 0.3 |
| February | 59% | 0.9 |
| March | 68% | 2.4 |
| April | 70% | 4.0 |
| May | 66% | 5.0 |
| June | 65% | 5.3 |
| July | 63% | 4.8 |
| August | 63% | 3.8 |
| September | 61% | 2.4 |
| October | 55% | 1.1 |
| November | 55% | 0.4 |
| December | 56% | 0.1 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Sutton (1 mi W) record?
A normal year at Sutton (1 mi W) brings 10,388 heating degree days, 93% more than the median U.S. place (5,373), and 3 cooling degree days, 100% fewer than the median (908). Eleven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 611 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,527 | 0 |
| February | 1,235 | 0 |
| March | 1,197 | 0 |
| April | 821 | 0 |
| May | 547 | 0 |
| June | 314 | 1 |
| July | 225 | 2 |
| August | 304 | 0 |
| September | 542 | 0 |
| October | 919 | 0 |
| November | 1,284 | 0 |
| December | 1,474 | 0 |
| Year (annual) | 10,388 | 3 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00508915. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Sutton (1 mi W)'s climate compare?
Sutton (1 mi W) is warmer than 48 of the 85 places with their own NOAA record in Alaska, and wetter than 35. Across the 7,247 U.S. stations with normals, its annual mean of 36.5°F is warmer than 2%.
In the Köppen classification computed from these normals, Sutton (1 mi W) is Dsc: continental, dry-summer, cool summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Sutton (1 mi W) share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Sutton-Alpine, AK1,361 people · 2 mi NE
- Chickaloon, AK318 people · 21 mi E
- Glacier View, AK209 people · 38 mi E
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Sutton (1 mi W)'s climate
What is the coldest month at Sutton (1 mi W)?
January, with a normal high of 23°F and a normal low of 9°F. The warmest is July (69°F by day, 47°F at night).
Does it snow at Sutton (1 mi W)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Lazy Mountain (7 miles away), records 83 inches of snow in a normal year.
What is the rainiest month at Sutton (1 mi W)?
September, with 3.31 in of precipitation in a normal year; the driest is April with 0.50 in.
What plant hardiness zone is Sutton (1 mi W) in?
The USDA's 2023 map puts Sutton (1 mi W) in zone 5a in ZIP code 99645, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −26°F (19 years, 1991-2020): zone 4a.
How late can frost come at Sutton (1 mi W)?
In half of years the last 32°F night comes after June 1; in one year in ten it comes after June 13. Waiting until June 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Alaska climateThe statewide normals and every place in the state
- Lazy Mountain, AK7 miles from this station, 35.4°F a year
- Palmer, AK10 miles from this station, 37.1°F a year
- Little Su At Hatcher Pass Bridge, AK11 miles from this station, 35.6°F a year
- Ben's Farm, AK13 miles from this station, 36.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made