North Lynnwood has some of the coolest summers among U.S. towns
January mornings start at about 36°. The gap between a January night and a July afternoon is 39°. Winters are mild: January nights here are milder than in 82% of U.S. towns. Tender plants can go out after about March 9; in half of years the first frost comes by November 17.
A year in North Lynnwood at a glance
Each month’s typical high and low, and what it brings.
What stands out about North Lynnwood’s climate
Compared with towns across the U.S., with North Lynnwood’s place in Washington beside it.
What a year in North Lynnwood feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 250 frost-free days a year
In half of years the last 32° night comes by March 9 and the first by November 17. Frost and day counts come from NOAA’s station at Everett Snohomish Airport, 4 miles from the town’s center, 110 ft higher.
The 2023 USDA map puts North Lynnwood’s center in zone 9a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 20°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 4 inches of snow a winter
Snow, measured at Seattle Sand Pt Wsfo, WA, falls mostly in December. Precipitation (rain plus melted snow) adds up to 38 inches a year; December is the wettest month and July the driest. Rain or snow falls on about 163 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in North Lynnwood
98% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Everett Snohomish Airport.
Living with North Lynnwood’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
250 frost-free days in zone 9a. The last frost comes by Mar 9 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 17.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September.
Parks & trails →Of the yearly building losses FEMA expects in North Lynnwood from natural hazards, earthquakes are the largest share (68%); heat waves, cold waves, winter storms and ice storms together are 6%. Normals are averages; the hazards page covers the extremes.
Natural hazards →North Lynnwood and its neighbors
Every town next door is within a degree of North Lynnwood in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like North Lynnwood’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 |
|---|---|---|---|---|
| North Lynnwood, WA | 36° | 74° | 38" | 3.8" |
| Kentfield, CA | 42° | 74° | 35" | 0.0" |
| West Haven-Sylvan, OR | 36° | 80° | 44" | 3.6" |
| Nantucket, MA | 26° | 76° | 44" | 25" |
| Springs, NY | 24° | 80° | 44" | 27" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in North Lynnwood averaged 1.0° warmer than the 1900s. The biggest change is in January (+2.4°).
A smaller shift than in 75% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How North Lynnwood compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with North Lynnwood’s place among Washington’s.
North Lynnwood weather by month
Highs, lows and precipitation from NOAA’s grid at North Lynnwood’s center; snow, wet days and snow on the ground from Seattle Sand Pt Wsfo, WA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 46° | 36° | 4.8" | 0.9" | 19 | 1 | 36° – 45° |
| February | 48° | 36° | 3.6" | 1.0" | 16 | 1 | 34° – 47° |
| March | 52° | 38° | 4.2" | 0.0" | 18 | 0 | 41° – 49° |
| April | 57° | 41° | 3.0" | 0.0" | 16 | 0 | 45° – 54° |
| May | 64° | 46° | 2.2" | 0.0" | 12 | 0 | 51° – 59° |
| June | 68° | 51° | 1.8" | 0.0" | 11 | 0 | 56° – 64° |
| July | 74° | 55° | 0.9" | 0.0" | 5 | 0 | 60° – 68° |
| August | 75° | 55° | 1.0" | 0.0" | 6 | 0 | 60° – 67° |
| September | 69° | 51° | 1.8" | 0.0" | 9 | 0 | 57° – 63° |
| October | 59° | 45° | 3.8" | 0.0" | 15 | 0 | 48° – 56° |
| November | 50° | 39° | 5.3" | 0.2" | 19 | 0 | 41° – 49° |
| December | 45° | 35° | 5.3" | 1.7" | 20 | 1 | 36° – 43° |
| Year | 59° | 44° | 37.7" | 3.8" | 163 | 2 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 34° to 47°. September is the most reliable, staying within 6°.
Where North Lynnwood’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at North Lynnwood’s center.
- Snow: Seattle Sand Pt Wsfo, WA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Everett Snohomish Airport, 4 miles from the town’s center, 110 ft higher; 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.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about North Lynnwood’s climate
What is the weather like in North Lynnwood?
A typical July afternoon reaches 74°, a January night drops to 36°, and about 4 inches of snow falls in a normal winter. Milder January nights than 82% of U.S. towns; cooler July afternoons than all but 161 U.S. towns.
How cold does it get in North Lynnwood in winter?
December nights average 35°. About 29 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 36°.
How much snow does North Lynnwood get?
About 3.8 inches in a normal winter at Seattle Sand Pt Wsfo, WA, most of it in December, with snow on the ground about 2 days a year.
How hot does it get in North Lynnwood?
July, with a typical high of 74°. 90° days are rare: none in a normal year at Everett Snohomish Airport.
When is the first and last frost in North Lynnwood?
In half of years the last spring frost (32°) comes by March 9 and the first fall frost by November 17, about 250 frost-free days, at Everett Snohomish Airport.
What growing zone is North Lynnwood in?
Zone 9a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 20°.
What is the best time of year to visit North Lynnwood?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is North Lynnwood getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 75% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in North Lynnwood.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.