Climate Comfort Score
73/100
Good
NOAA 1991–2020 normals 52°F annual avg Public-domain federal data
Forest Grove, OR Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 52°F
- Avg annual temp
- 73/100
- Comfort score
- 46.7"
- Annual precip
- 193d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Forest Grove
Forest Grove, Oregon averages 52°F a year and scores 73/100 on the comfort index - good, milder than 68% of U.S. cities.
- 52°F
- average temperature, NOAA 1991-2020 normal
- 73/100
- comfort score, milder than 68% of U.S. cities
- 46.7"
- annual precipitation · 3" snow
- 193 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
52°F (11°C)
Avg High
62°F
Avg Low
42°F
Annual Precip
46.7"
Annual Snow
2.7"
Comfort Score
73/100
Good
Avg Annual Temperature
52°F
30-year mean (NOAA NCEI)
Annual Precipitation
46.7"
Plus 2.7" of snow
Comfort score vs national 100-point ceiling (Forest Grove) 73.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Forest Grove area.
How Forest Grove compares to every U.S. city
Forest Grove's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
73 Top 32% higher than 68% 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 Forest Grove
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Forest Grove captures average conditions across the spread shown, the most recent decade is warmer than the 30-year mean.
- 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 45°F (7°C) | 33°F (0°C) | 39°F (4°C) | 7.2" | 0.6" | 13.3 | 0.0 |
| February | 49°F (10°C) | 33°F (1°C) | 41°F (5°C) | 5.8" | 0.6" | 12.1 | 0.0 |
| March | 55°F (13°C) | 36°F (2°C) | 45°F (7°C) | 5.0" | 0.0" | 8.1 | 0.0 |
| April | 60°F (16°C) | 39°F (4°C) | 50°F (10°C) | 3.3" | 0.0" | 3.0 | 0.0 |
| May | 68°F (20°C) | 45°F (7°C) | 57°F (14°C) | 2.2" | 0.0" | 0.3 | 1.1 |
| June | 73°F (23°C) | 50°F (10°C) | 61°F (16°C) | 1.4" | 0.0" | 0.0 | 2.3 |
| July | 81°F (27°C) | 54°F (12°C) | 68°F (20°C) | 0.3" | 0.0" | 0.0 | 7.5 |
| August | 82°F (28°C) | 54°F (12°C) | 68°F (20°C) | 0.5" | 0.0" | 0.0 | 8.4 |
| September | 76°F (24°C) | 49°F (9°C) | 62°F (17°C) | 1.3" | 0.0" | 0.0 | 3.4 |
| October | 63°F (17°C) | 42°F (5°C) | 52°F (11°C) | 3.7" | 0.2" | 2.3 | 0.1 |
| November | 51°F (11°C) | 36°F (2°C) | 44°F (6°C) | 7.2" | 0.0" | 8.8 | 0.0 |
| December | 44°F (7°C) | 33°F (0°C) | 38°F (4°C) | 8.7" | 1.3" | 13.2 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 7.2"
Snow: 0.6"
18.6 days with precipitation
February 5.8"
Snow: 0.6"
15.0 days with precipitation
March 5.0"
17.2 days with precipitation
April 3.3"
15.9 days with precipitation
May 2.2"
11.2 days with precipitation
June 1.4"
8.1 days with precipitation
July 0.3"
2.4 days with precipitation
August 0.5"
2.9 days with precipitation
September 1.3"
5.4 days with precipitation
October 3.7"
Snow: 0.2"
11.4 days with precipitation
November 7.2"
18.6 days with precipitation
December 8.7"
Snow: 1.3"
19.4 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 26
50% probability date
Last Spring Freeze
April 16
50% probability date
Growing Season
193 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,027
Higher = more heating needed
Cooling Degree Days
347
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What Forest Grove's climate means for you
Forest Grove runs 52°F a year - peaking in August, coldest in December.
- Gardeners get about 193 frost-free days, with the last spring freeze near April 16 - plan the planting calendar around it, not the regional average.
- Energy bills track 5,027 heating and 347 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: Forest Grove, OR
The NOAA 1991–2020 climate normals describe Forest Grove, Oregon as a location with an annual average temperature of 52°F, ranging from a mean daily high of 62°F to a mean daily low of 42°F. August is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00352997, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Forest Grove receives roughly 46.7 inches of precipitation each year, with 2.7 inches typically falling as snow. The frost-free season averages 193 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 16 and the first fall freeze near October 26. For energy use, 5,027 heating degree days and 347 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Forest Grove scores 73/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, August-driven heat peaks in summer, and December-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in Forest Grove, OR? ▼
The average annual temperature in Forest Grove, Oregon is 52°F. The warmest month averages 82°F (28°C) and the coldest averages 33°F (0°C).
How much rain does Forest Grove get? ▼
Forest Grove receives 46.7 inches of precipitation annually, including 2.7 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Forest Grove? ▼
Forest Grove has a climate comfort score of 73/100 (Good), milder than 68% of U.S. cities in the PlainClimate database.
When is the growing season in Forest Grove? ▼
Forest Grove has approximately 193 frost-free days per year, with the last spring freeze around April 16 and the first fall freeze around October 26.
How much energy does heating and cooling require in Forest Grove? ▼
Forest Grove has 5,027 heating degree days and 347 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 Forest Grove climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00352997 near Forest Grove.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00352997. 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.