Photo: AlaskaTrekker at English Wikipedia · CC BY 2.5Nondalton gets about 88 inches of snow a winter, more than 96% of U.S. towns
The warmest part of a July day comes in at 65° on average. Precipitation peaks in September and eases off in April. Summers stay cool: July afternoons here are cooler than in almost every U.S. town. Long walks are most pleasant from June to August, when afternoons reach 62–65°.
A year in Nondalton at a glance
Each month’s typical high and low, and what it brings.
What stands out about Nondalton’s climate
Compared with towns across the U.S., with Nondalton’s place in Alaska beside it.
What a year in Nondalton feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 144 frost-free days a year
In half of years the last 32° night comes by May 10 and the first by October 1. Frost and day counts come from NOAA’s station at Iliamna Airport, 16 miles from the town’s center, 310 ft lower.
The 2023 USDA map puts Nondalton’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −25°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 88 inches of snow a winter
Snow, measured at Port Alsworth, AK, is heaviest from November through December, about 18 inches a month. Precipitation (rain plus melted snow) adds up to 25 inches a year; September is the wettest month and April the driest. Rain or snow falls on about 95 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Nondalton
Nearly all of the work is heating: a normal year has almost no cooling days. Months averaging under 55° run from September through June.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Iliamna Airport.
Living with Nondalton’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
144 frost-free days in zone 4b. The last frost comes by May 10 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 1.
Months with highs of 62–84° and lows of 40° or more: June, July and August. 10 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Nondalton from natural hazards, earthquakes are the largest share (46%); heat waves, cold waves, winter storms and ice storms together are 16%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Nondalton and similar climates
TownRatings has no climate map of the towns around Nondalton yet.
Climates most like Nondalton’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Nondalton, AK | 12° | 65° | 25" | 88" |
| Marquette, MI | 11° | 76° | 32" | 102" |
| Superior, WI | 6° | 76° | 30" | 56" |
| Duluth, MN | 5° | 76° | 30" | 56" |
| Woodland Park, CO | 11° | 77° | 22" | 134" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
How Nondalton compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Nondalton’s place among Alaska’s.
Nondalton weather by month
Highs, lows and precipitation from the nearest NOAA station; snow, wet days and snow on the ground from Port Alsworth, AK. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground |
|---|---|---|---|---|---|---|
| January | 25° | 12° | 0.9" | 13.9" | 8 | 22 |
| February | 30° | 16° | 1.1" | 13.1" | 7 | 18 |
| March | 32° | 16° | 0.8" | 12.1" | 6 | 23 |
| April | 43° | 29° | 0.8" | 7.2" | 5 | 7 |
| May | 55° | 38° | 1.2" | 0.8" | 4 | 0 |
| June | 62° | 45° | 1.5" | 0.0" | 6 | 0 |
| July | 65° | 51° | 3.1" | 0.0" | 9 | 0 |
| August | 64° | 50° | 4.1" | 0.0" | 11 | 0 |
| September | 56° | 43° | 5.0" | 0.3" | 11 | 0 |
| October | 45° | 32° | 2.8" | 4.9" | 9 | 5 |
| November | 33° | 21° | 2.2" | 17.3" | 10 | 16 |
| December | 28° | 15° | 1.5" | 18.3" | 10 | 23 |
| Year | 45° | 31° | 25.0" | 87.9" | 95 | 112 |
Where Nondalton’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s 1991–2020 normals at the nearest station (NOAA’s grid doesn’t cover Alaska).
- Snow: Port Alsworth, AK.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Iliamna Airport, 16 miles from the town’s center, 310 ft lower; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Nondalton’s climate
What is the weather like in Nondalton?
A typical July afternoon reaches 65°, a January night drops to 12°, and about 88 inches of snow falls in a normal winter. Colder January nights than 91% of U.S. towns; cooler July afternoons than all but 21 U.S. towns.
How cold does it get in Nondalton in winter?
January nights average 12°. About 170 nights a year reach 32° or below and 32 reach 0° or below.
How much snow does Nondalton get?
About 88 inches in a normal winter at Port Alsworth, AK, heaviest from November through December, about 18 inches a month, with snow on the ground about 112 days a year.
How hot does it get in Nondalton?
July, with a typical high of 65°. 90° days are rare: none in a normal year at Iliamna Airport.
When is the first and last frost in Nondalton?
In half of years the last spring frost (32°) comes by May 10 and the first fall frost by October 1, about 144 frost-free days, at Iliamna Airport.
What growing zone is Nondalton in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −25°.
What is the best time of year to visit Nondalton?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Neighbors talk weather
Gardens, snow, and the best days of the year in Nondalton.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.