Leavenworth, Washington climate: Normal weather by month, frost dates and records
Leavenworth's normal year runs from 19°F January nights to 87°F July afternoons, with 25.7 inches of precipitation and 80 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.5°C, January lows of −7°C, July highs of 31°C, 653 mm of precipitation a year.
- NOAA stationLeavenworth (3 mi S)
- Station IDUSC00454572
- Location47.56°N 120.67°W
- Elevation1,128 ft (344 m)
- Population2,908
On October 22, the normal high in Leavenworth is 58°F and the normal low 32°F, and the chance of measurable rain or snow is 32%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Leavenworth.
- Jan 34° 19°
- Feb 42° 21°
- Mar 52° 26°
- Apr 61° 32°
- May 71° 40°
- Jun 77° 46°
- Jul 87° 51°
- Aug 87° 50°
- Sep 78° 42°
- Oct 62° 33°
- Nov 44° 26°
- Dec 34° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Leavenworth each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 19°F. The most precipitation falls in December (4.52 in), the least in August (0.37 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 34°F | 19°F | 26.4°F | 4.12 | 22.1 | 14 | <1 | 30 | 8 h 50 min |
| February | 42°F | 21°F | 31.7°F | 2.90 | 12.6 | 11 | <1 | 26 | 10 h 10 min |
| March | 52°F | 26°F | 39.2°F | 2.46 | 4.7 | 9 | <1 | 25 | 11 h 50 min |
| April | 61°F | 32°F | 46.7°F | 1.22 | 0.0 | 7 | <1 | 12 | 13 h 30 min |
| May | 71°F | 40°F | 55.4°F | 1.40 | 0.0 | 7 | 1 | 2 | 15 h |
| June | 77°F | 46°F | 61.5°F | 1.04 | 0.0 | 6 | 4 | <1 | 16 h |
| July | 87°F | 51°F | 69.0°F | 0.45 | 0.0 | 3 | 14 | <1 | 15 h 40 min |
| August | 87°F | 50°F | 68.6°F | 0.37 | 0.0 | 2 | 14 | <1 | 14 h 20 min |
| September | 78°F | 42°F | 59.8°F | 0.76 | 0.0 | 4 | 5 | 1 | 12 h 40 min |
| October | 62°F | 33°F | 47.6°F | 2.37 | 0.3 | 9 | <1 | 12 | 11 h |
| November | 44°F | 26°F | 35.0°F | 4.08 | 8.1 | 14 | <1 | 23 | 9 h 20 min |
| December | 34°F | 20°F | 26.8°F | 4.52 | 32.4 | 14 | <1 | 30 | 8 h 30 min |
| Year (annual) | 61°F | 34°F | 47.3°F | 25.69 | 80.2 | 99 | 39 | 160 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −7°C | −3.1°C | 105 mm | 56 cm |
| February | 6°C | −6°C | −0.2°C | 74 mm | 32 cm |
| March | 11°C | −3°C | 4.0°C | 62 mm | 12 cm |
| April | 16°C | 0°C | 8.2°C | 31 mm | 0 cm |
| May | 22°C | 4°C | 13.0°C | 36 mm | 0 cm |
| June | 25°C | 8°C | 16.4°C | 26 mm | 0 cm |
| July | 31°C | 11°C | 20.6°C | 11 mm | 0 cm |
| August | 31°C | 10°C | 20.3°C | 9 mm | 0 cm |
| September | 26°C | 5°C | 15.4°C | 19 mm | 0 cm |
| October | 17°C | 1°C | 8.7°C | 60 mm | 1 cm |
| November | 7°C | −3°C | 1.7°C | 104 mm | 21 cm |
| December | 1°C | −7°C | −2.9°C | 115 mm | 82 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00454572; 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.
When is the best weather to visit Leavenworth?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September has the fewest days with rain (4).
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 USC00454572.
When is the last frost in Leavenworth?
In Leavenworth, the last spring frost (32°F) comes after May 10 in half of years and after May 28 in one year in ten; the first autumn frost comes before September 30 in half of years and before September 18 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
- May 101 year in 10 after May 28; 9 in 10 after April 27
- First autumn frost, half of years before
- September 301 year in 10 before September 18; 9 in 10 before October 14
NOAA puts the median frost-free season at 142 days, and the season without a hard freeze (28°F) at 171 days.
A hard freeze (28°F) comes after April 25 in half of springs and before October 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Leavenworth in zone 7a in ZIP code 98821, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Leavenworth's NOAA station is in zone 6b: the coldest night of a typical year reaches −1°F (16 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 Washington · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00454572; 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 in Leavenworth?
In a normal year in Leavenworth, 39 days a year reach 90°F (5 of them 100°F or more), 160 nights fall to 32°F or colder and 99 days bring measurable precipitation.
- Days at 90°F or more
- 39a normal year
- Days at 100°F or more
- 5a normal year
- Nights at 32°F or colder
- 160a normal year
- Days that stay below freezing
- 26high of 32°F or less
- Days with 0.01 inch of precipitation
- 99a normal year
- Days with 1 inch of snow or more
- 22a normal year
The highest temperature in this station's record (since 1914) is 110°F, on July 17, 1941; the lowest is −36°F, on December 30, 1968.
The wettest calendar year on that record is 1972, with 38.56 in; the snowiest season is 1968–69, with 217.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00454572; records: ACIS (NOAA Regional Climate Centers), station USC00454572. Records use complete months only; a month missing more than three days is left out.
How sunny is Leavenworth?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Leavenworth, 3.8 kWh per square metre a day. July is the sunniest month (86%) and December the cloudiest (54%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 56% | 1.2 |
| February | 64% | 2.1 |
| March | 63% | 3.1 |
| April | 67% | 4.6 |
| May | 70% | 5.7 |
| June | 74% | 6.3 |
| July | 86% | 7.0 |
| August | 85% | 5.9 |
| September | 79% | 4.3 |
| October | 69% | 2.5 |
| November | 58% | 1.3 |
| December | 54% | 0.9 |
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 much heating and cooling does Leavenworth need?
A normal year in Leavenworth brings 6,806 heating degree days, 27% more than the median U.S. place (5,373), and 381 cooling degree days, 58% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,094 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,195 | 0 |
| February | 931 | 0 |
| March | 801 | 0 |
| April | 551 | 0 |
| May | 309 | 10 |
| June | 146 | 41 |
| July | 35 | 159 |
| August | 33 | 145 |
| September | 183 | 27 |
| October | 540 | 0 |
| November | 899 | 0 |
| December | 1,184 | 0 |
| Year (annual) | 6,806 | 381 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00454572. 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.
Has Leavenworth been warmer than normal lately?
Over 44 complete years from 1919 to 2018, the station's annual mean temperature rose at a fitted 1.1°F per century (+0.06°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Leavenworth's climate compare?
Leavenworth is warmer than 14 of the other 95 places with their own NOAA record in Washington, and wetter than 48. Across the 7,247 U.S. stations with normals, its annual mean of 47.3°F is warmer than 29%.
In the Köppen classification computed from these normals, Leavenworth is Dsb: continental, dry-summer, warm 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 Leavenworth share this climate record?
Cashmere has no NOAA station with 1991-2020 normals of its 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.
- Cashmere, WA3,333 people · 10 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 Leavenworth's climate
What is the coldest month in Leavenworth?
January, with a normal high of 34°F and a normal low of 19°F. The warmest is July (87°F by day, 51°F at night).
Does it snow in Leavenworth?
Yes: 80 inches in a normal year, falling on 29 days with 0.1 inch or more, the most in December (32.4 inches).
What is the rainiest month in Leavenworth?
December, with 4.52 in of precipitation in a normal year; the driest is August with 0.37 in.
What plant hardiness zone is Leavenworth in?
The USDA's 2023 map puts Leavenworth in zone 7a in ZIP code 98821, the nearest ZIP area. By the same method at Leavenworth's NOAA station, the coldest night of a typical year reaches −1°F (16 years, 1991-2020): zone 6b.
How late can frost come in Leavenworth?
In half of years the last 32°F night comes after May 10; in one year in ten it comes after May 28. Waiting until May 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Leavenworth in OctoberThis month day by day, its records and recent years
- Washington climateThe statewide normals and every place in the state
- Plain, WA16 miles from this station, 45.8°F a year
- Entiat, WA19 miles from this station, 51.4°F a year
- Wenatchee, WA25 miles from this station, 51.2°F a year
- Cle Elum, WA28 miles from this station, 46.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made