Climate Comfort Score
52/100
Moderate
NOAA 1991–2020 normals 53°F annual avg Public-domain federal data
Bonneville Dam, OR Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 53°F
- Avg annual temp
- 52/100
- Comfort score
- 80.2"
- Annual precip
- 258d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Bonneville Dam
Bonneville Dam, Oregon averages 53°F a year and scores 52/100 on the comfort index - moderate, milder than 26% of U.S. cities.
- 53°F
- yearly average temperature, NOAA normal
- 52/100
- comfort score, milder than 26% of U.S. cities
- 80.2"
- annual precipitation · 10" snow
- 258 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
53°F (12°C)
Avg High
61°F
Avg Low
45°F
Annual Precip
80.2"
Annual Snow
10.3"
Comfort Score
52/100
Moderate
Avg Annual Temperature
53°F
30-year mean (NOAA NCEI)
Annual Precipitation
80.2"
Plus 10.3" of snow
Comfort score vs national 100-point ceiling (Bonneville Dam) 52.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Bonneville Dam area.
How Bonneville Dam compares to every U.S. city
Bonneville Dam's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
52 Top 74% higher than 26% 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 Bonneville Dam
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Bonneville Dam 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 | 43°F (6°C) | 34°F (1°C) | 39°F (4°C) | 11.3" | 3.5" | 9.5 | 0.0 |
| February | 47°F (8°C) | 36°F (2°C) | 41°F (5°C) | 8.7" | 3.4" | 7.2 | 0.0 |
| March | 53°F (12°C) | 38°F (3°C) | 46°F (8°C) | 9.1" | 0.3" | 3.5 | 0.0 |
| April | 59°F (15°C) | 42°F (6°C) | 51°F (10°C) | 6.5" | 0.0" | 0.3 | 0.0 |
| May | 67°F (19°C) | 48°F (9°C) | 57°F (14°C) | 4.1" | 0.0" | 0.0 | 0.2 |
| June | 72°F (22°C) | 52°F (11°C) | 62°F (17°C) | 3.2" | 0.0" | 0.0 | 1.2 |
| July | 79°F (26°C) | 57°F (14°C) | 68°F (20°C) | 0.6" | 0.0" | 0.0 | 3.8 |
| August | 80°F (27°C) | 58°F (14°C) | 69°F (20°C) | 0.9" | 0.0" | 0.0 | 3.9 |
| September | 74°F (23°C) | 53°F (12°C) | 64°F (18°C) | 2.6" | 0.0" | 0.0 | 1.4 |
| October | 62°F (17°C) | 47°F (8°C) | 55°F (13°C) | 7.3" | 0.0" | 0.3 | 0.0 |
| November | 50°F (10°C) | 40°F (4°C) | 45°F (7°C) | 12.5" | 0.2" | 3.1 | 0.0 |
| December | 42°F (6°C) | 35°F (2°C) | 39°F (4°C) | 13.4" | 2.9" | 9.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 11.3"
Snow: 3.5"
21.6 days with precipitation
February 8.7"
Snow: 3.4"
18.2 days with precipitation
March 9.1"
Snow: 0.3"
20.2 days with precipitation
April 6.5"
18.8 days with precipitation
May 4.1"
14.5 days with precipitation
June 3.2"
11.2 days with precipitation
July 0.6"
4.2 days with precipitation
August 0.9"
3.7 days with precipitation
September 2.6"
7.8 days with precipitation
October 7.3"
15.4 days with precipitation
November 12.5"
Snow: 0.2"
21.1 days with precipitation
December 13.4"
Snow: 2.9"
22.1 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 27
50% probability date
Last Spring Freeze
March 14
50% probability date
Growing Season
258 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,784
Higher = more heating needed
Cooling Degree Days
356
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nearby Cities
What Bonneville Dam's climate means for you
Bonneville Dam runs 53°F a year - peaking in August, coldest in January.
- Gardeners get about 258 frost-free days, with the last spring freeze near March 14 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,784 heating and 356 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: Bonneville Dam, OR
The NOAA 1991–2020 climate normals describe Bonneville Dam, Oregon as a location with an annual average temperature of 53°F, ranging from a mean daily high of 61°F to a mean daily low of 45°F. August is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00350897, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Bonneville Dam averages 80.2 inches of precipitation a year, with 10.3 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 258 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 14 and the first fall freeze near November 27. As for energy demand, 4,784 heating degree days and 356 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Bonneville Dam scores 52/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings August-driven heat, and winter brings January-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in Bonneville Dam, OR? ▼
The average annual temperature in Bonneville Dam, Oregon is 53°F. The warmest month averages 80°F (27°C) and the coldest averages 34°F (1°C).
How much rain does Bonneville Dam get? ▼
Bonneville Dam receives 80.2 inches of precipitation annually, including 10.3 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Bonneville Dam? ▼
Bonneville Dam has a climate comfort score of 52/100 (Moderate), milder than 26% of U.S. cities in the PlainClimate database.
When is the growing season in Bonneville Dam? ▼
Bonneville Dam has approximately 258 frost-free days per year, with the last spring freeze around March 14 and the first fall freeze around November 27.
How much energy does heating and cooling require in Bonneville Dam? ▼
Bonneville Dam has 4,784 heating degree days and 356 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 Bonneville Dam climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00350897 near Bonneville Dam.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00350897. 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.