Climate Comfort Score
72/100
Good
NOAA 1991–2020 normals 54°F annual avg Public-domain federal data
Seattle Boeing Fld, WA Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 54°F
- Avg annual temp
- 72/100
- Comfort score
- 36.5"
- Annual precip
- 249d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Seattle Boeing Fld
Seattle Boeing Fld, Washington averages 54°F a year and scores 72/100 on the comfort index - good, milder than 66% of U.S. cities.
- 54°F
- annual average temperature (NOAA normal)
- 72/100
- comfort score, milder than 66% of U.S. cities
- 36.5"
- yearly precipitation total
- 249 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
54°F (12°C)
Avg High
62°F
Avg Low
46°F
Annual Precip
36.5"
Comfort Score
72/100
Good
Avg Annual Temperature
54°F
30-year mean (NOAA NCEI)
Annual Precipitation
36.5"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Seattle Boeing Fld) 72.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Seattle Boeing Fld area.
How Seattle Boeing Fld compares to every U.S. city
Seattle Boeing Fld's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
72 Top 34% higher than 66% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Seattle Boeing Fld
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Seattle Boeing Fld, the NOAA 1991-2020 normal captures average conditions across that spread - notably, the most recent decade runs warmer than the 30-year mean itself.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 49°F (9°C) | 37°F (3°C) | 43°F (6°C) | 5.2" | 7.0 | 0.0 |
| February | 51°F (10°C) | 37°F (3°C) | 44°F (7°C) | 3.7" | 7.0 | 0.0 |
| March | 55°F (13°C) | 39°F (4°C) | 47°F (8°C) | 3.9" | 3.0 | 0.0 |
| April | 60°F (15°C) | 44°F (6°C) | 52°F (11°C) | 2.9" | 0.3 | 0.0 |
| May | 67°F (19°C) | 49°F (10°C) | 58°F (14°C) | 2.0" | 0.2 | 0.0 |
| June | 71°F (22°C) | 54°F (12°C) | 63°F (17°C) | 1.2" | 0.0 | 0.5 |
| July | 77°F (25°C) | 58°F (14°C) | 67°F (20°C) | 0.6" | 0.0 | 1.5 |
| August | 77°F (25°C) | 58°F (15°C) | 68°F (20°C) | 0.8" | 0.0 | 1.1 |
| September | 72°F (22°C) | 54°F (12°C) | 63°F (17°C) | 1.4" | 0.0 | 0.0 |
| October | 61°F (16°C) | 46°F (8°C) | 54°F (12°C) | 3.5" | 0.3 | 0.0 |
| November | 53°F (12°C) | 40°F (4°C) | 46°F (8°C) | 5.8" | 4.2 | 0.0 |
| December | 48°F (9°C) | 36°F (2°C) | 42°F (6°C) | 5.5" | 7.9 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 5.2"
18.9 days with precipitation
February 3.7"
15.9 days with precipitation
March 3.9"
17.7 days with precipitation
April 2.9"
14.8 days with precipitation
May 2.0"
11.4 days with precipitation
June 1.2"
8.5 days with precipitation
July 0.6"
3.4 days with precipitation
August 0.8"
4.0 days with precipitation
September 1.4"
8.5 days with precipitation
October 3.5"
14.8 days with precipitation
November 5.8"
18.0 days with precipitation
December 5.5"
18.3 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 17
50% probability date
Last Spring Freeze
March 13
50% probability date
Growing Season
249 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,341
Higher = more heating needed
Cooling Degree Days
282
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 78% | 6.0 | N/A | N/A |
| February | 73% | 6.0 | 30% | 39% |
| March | 70% | 6.5 | 30% | 40% |
| April | 65% | 6.3 | 26% | 32% |
| May | 64% | 5.9 | 27% | 32% |
| June | 61% | 5.5 | 39% | 22% |
| July | 61% | 5.3 | 51% | 18% |
| August | 64% | 5.1 | 48% | 15% |
| September | 72% | 4.9 | 52% | 22% |
| October | 78% | 5.4 | N/A | N/A |
| November | 79% | 5.8 | N/A | N/A |
| December | 80% | 5.6 | N/A | N/A |
What Seattle Boeing Fld's climate means for you
Seattle Boeing Fld runs 54°F a year - peaking in August, coldest in December.
- Gardeners get about 249 frost-free days, with the last spring freeze near March 13 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,341 heating and 282 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Seattle Boeing Fld, WA
In Seattle Boeing Fld, Washington, the NOAA 1991–2020 climate normals put the annual average temperature at 54°F, ranging from a mean daily high of 62°F to a mean daily low of 46°F. August is typically the warmest month of the year, while December is the coldest. As thirty-year averages computed from station USW00024234, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Seattle Boeing Fld sees about 36.5 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 249 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 13 and the first fall freeze near November 17. On the energy side, 4,341 heating degree days and 282 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Seattle Boeing Fld scores 72/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings August-driven heat, and deep winter brings December-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Seattle Boeing Fld, WA? ▼
The average annual temperature in Seattle Boeing Fld, Washington is 54°F. The warmest month averages 77°F (25°C) and the coldest averages 36°F (2°C).
How much rain does Seattle Boeing Fld get? ▼
Seattle Boeing Fld receives 36.5 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Seattle Boeing Fld? ▼
Seattle Boeing Fld has a climate comfort score of 72/100 (Good), milder than 66% of U.S. cities in the PlainClimate database.
When is the growing season in Seattle Boeing Fld? ▼
Seattle Boeing Fld has approximately 249 frost-free days per year, with the last spring freeze around March 13 and the first fall freeze around November 17.
How much energy does heating and cooling require in Seattle Boeing Fld? ▼
Seattle Boeing Fld has 4,341 heating degree days and 282 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Seattle Boeing Fld climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00024234 near Seattle Boeing Fld.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00024234. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.