Climate Comfort Score
47/100
Moderate
2026 data Public-data reference. official source
Bonneville Dam, OR Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991-2020 normals →
30-year climate normals from 1 weather station (1991-2020).
Bonneville Dam, Oregon has an average annual temperature of 53°F and a climate comfort score of 47/100 (Moderate). Annual precipitation totals 80.2", including 10.3" of snow. Based on NOAA 30-year normals (1991–2020).
Avg Temperature
53°F (12°C)
Avg High
61°F
Avg Low
45°F
Annual Precip
80.2"
Annual Snow
10.3"
Comfort Score
47/100
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) 47.0%
National median (≈55)
PlainClimate composite — temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Bonneville Dam area.
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
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
Related Data
PlainEnviro
EPA environmental data — pollution, water quality, and environmental health by location
PlainCarbon
Carbon emissions data — greenhouse gas reporting and facility-level CO2 data
PlainHazard
Natural disaster data — weather-related hazards, FEMA declarations, and risk profiles
PlainAirData
EPA air quality data — AQI readings, pollutant levels, and air quality trends
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.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Bonneville Dam receives roughly 80.2 inches of precipitation each year, with 10.3 inches typically falling as snow. Growing-season length varies with elevation and microclimate, with the last spring freeze near March 14 and the first fall freeze near November 27. For energy use, 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 47/100 (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 August-driven heat, or deep winter for January-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 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 47/100 (Moderate). This score considers temperature mildness, humidity, precipitation, and extreme weather frequency.
When is the growing season in Bonneville Dam? ▼
Growing season data is not available for Bonneville Dam.
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. Higher heating degree days indicate greater winter energy demand, while higher cooling degree days indicate greater summer cooling needs.
Where does this Bonneville Dam climate data come from? ▼
All climate data comes from NOAA U.S. Climate Normals v1.0.1, covering the 30-year period from 1991 to 2020. Data is collected from weather station USC00350897. These 30-year averages are the standard reference for typical weather conditions.
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
