Climate Comfort Score
44/100
Moderate
NOAA 1991–2020 normals 50°F annual avg Public-domain federal data
Sunnyside, WA Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 50°F
- Avg annual temp
- 44/100
- Comfort score
- 7.7"
- Annual precip
- 158d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Sunnyside
Sunnyside, Washington averages 50°F a year and scores 44/100 on the comfort index - moderate, milder than 8% of U.S. cities.
- 50°F
- yearly average temperature, NOAA normal
- 44/100
- comfort score, milder than 8% of U.S. cities
- 7.7"
- annual precipitation
- 158 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
50°F (10°C)
Avg High
63°F
Avg Low
37°F
Annual Precip
7.7"
Comfort Score
44/100
Moderate
Avg Annual Temperature
50°F
30-year mean (NOAA NCEI)
Annual Precipitation
7.7"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Sunnyside) 44.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Sunnyside area.
How Sunnyside compares to every U.S. city
Sunnyside's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 Top 92% higher than 8% 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 Sunnyside
MethodologyZooming out from Sunnyside's own normal, the chart below shows how the U.S. land temperature anomaly has tracked the global mean since 1900 - the most recent decade sits warmer than the 30-year mean shown here.
- 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 | 38°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | 1.0" | 26.0 | 0.0 |
| February | 45°F (7°C) | 24°F (-4°C) | 35°F (2°C) | 0.7" | 21.8 | 0.0 |
| March | 55°F (13°C) | 30°F (-1°C) | 43°F (6°C) | 0.5" | 14.7 | 0.0 |
| April | 63°F (17°C) | 36°F (2°C) | 49°F (10°C) | 0.6" | 6.3 | 0.0 |
| May | 73°F (23°C) | 44°F (7°C) | 58°F (15°C) | 0.8" | 0.9 | 2.5 |
| June | 79°F (26°C) | 49°F (10°C) | 64°F (18°C) | 0.6" | 0.0 | 5.0 |
| July | 88°F (31°C) | 54°F (12°C) | 71°F (22°C) | 0.1" | 0.0 | 17.8 |
| August | 87°F (30°C) | 52°F (11°C) | 69°F (21°C) | 0.3" | 0.0 | 15.1 |
| September | 78°F (25°C) | 45°F (7°C) | 61°F (16°C) | 0.4" | 0.1 | 4.6 |
| October | 64°F (18°C) | 35°F (2°C) | 49°F (10°C) | 0.7" | 7.2 | 0.0 |
| November | 48°F (9°C) | 27°F (-3°C) | 38°F (3°C) | 0.8" | 20.1 | 0.0 |
| December | 37°F (3°C) | 22°F (-5°C) | 30°F (-1°C) | 1.2" | 26.4 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.0"
8.6 days with precipitation
February 0.7"
6.2 days with precipitation
March 0.5"
5.6 days with precipitation
April 0.6"
5.9 days with precipitation
May 0.8"
6.1 days with precipitation
June 0.6"
4.3 days with precipitation
July 0.1"
2.0 days with precipitation
August 0.3"
2.3 days with precipitation
September 0.4"
2.8 days with precipitation
October 0.7"
5.8 days with precipitation
November 0.8"
7.8 days with precipitation
December 1.2"
8.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 6
50% probability date
Last Spring Freeze
May 1
50% probability date
Growing Season
158 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,994
Higher = more heating needed
Cooling Degree Days
499
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Sunnyside's climate means for you
Sunnyside runs 50°F a year - peaking in July, coldest in December.
- Gardeners get about 158 frost-free days, with the last spring freeze near May 1 - plan the planting calendar around it, not the regional average.
- Energy bills track 5,994 heating and 499 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: Sunnyside, WA
An annual average temperature of 50°F, ranging from a mean daily high of 63°F to a mean daily low of 37°F is what the NOAA 1991–2020 climate normals report for Sunnyside, Washington. July is typically the warmest month of the year, while December is the coldest. That baseline comes from station USC00458207 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Beyond temperature, Sunnyside averages 7.7 inches of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 158 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 1 and the first fall freeze near October 6. Turning to energy use, 5,994 heating degree days and 499 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Sunnyside scores 44/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for December-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
Frequently Asked Questions
What is the average temperature in Sunnyside, WA? ▼
The average annual temperature in Sunnyside, Washington is 50°F. The warmest month averages 88°F (31°C) and the coldest averages 22°F (-5°C).
How much rain does Sunnyside get? ▼
Sunnyside receives 7.7 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Sunnyside? ▼
Sunnyside has a climate comfort score of 44/100 (Moderate), milder than 8% of U.S. cities in the PlainClimate database.
When is the growing season in Sunnyside? ▼
Sunnyside has approximately 158 frost-free days per year, with the last spring freeze around May 1 and the first fall freeze around October 6.
How much energy does heating and cooling require in Sunnyside? ▼
Sunnyside has 5,994 heating degree days and 499 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 Sunnyside climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00458207 near Sunnyside.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00458207. 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.