Climate Comfort Score
48/100
Moderate
NOAA 1991–2020 normals 54°F annual avg Public-domain federal data
Mcnary Dam, WA Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 54°F
- Avg annual temp
- 48/100
- Comfort score
- 7.8"
- Annual precip
- 222d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Mcnary Dam
Mcnary Dam, Washington averages 54°F a year and scores 48/100 on the comfort index - moderate, milder than 18% of U.S. cities.
- 54°F
- yearly average temperature, NOAA normal
- 48/100
- comfort score, milder than 18% of U.S. cities
- 7.8"
- precipitation, annual total
- 222 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
54°F (12°C)
Avg High
64°F
Avg Low
44°F
Annual Precip
7.8"
Comfort Score
48/100
Moderate
Avg Annual Temperature
54°F
30-year mean (NOAA NCEI)
Annual Precipitation
7.8"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Mcnary Dam) 48.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Mcnary Dam area.
How Mcnary Dam compares to every U.S. city
Mcnary Dam's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
48 Top 82% higher than 18% 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 Mcnary Dam
MethodologyMcnary Dam's NOAA 1991-2020 normal sits inside a longer story: U.S. land temperatures have been tracking (and drifting from) the global mean since 1900, and the chart below shows that spread, with the most recent decade running 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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 41°F (5°C) | 30°F (-1°C) | 35°F (2°C) | 1.0" | 17.4 | 0.0 |
| February | 47°F (8°C) | 31°F (0°C) | 39°F (4°C) | 0.8" | 15.5 | 0.0 |
| March | 56°F (13°C) | 36°F (2°C) | 46°F (8°C) | 0.8" | 5.8 | 0.0 |
| April | 64°F (18°C) | 42°F (5°C) | 53°F (12°C) | 0.6" | 0.5 | 0.0 |
| May | 73°F (23°C) | 49°F (9°C) | 61°F (16°C) | 0.8" | 0.0 | 0.8 |
| June | 80°F (26°C) | 55°F (13°C) | 67°F (20°C) | 0.6" | 0.0 | 4.0 |
| July | 89°F (32°C) | 62°F (16°C) | 75°F (24°C) | 0.1" | 0.0 | 14.9 |
| August | 88°F (31°C) | 61°F (16°C) | 75°F (24°C) | 0.2" | 0.0 | 12.2 |
| September | 78°F (26°C) | 54°F (12°C) | 66°F (19°C) | 0.3" | 0.0 | 1.6 |
| October | 64°F (18°C) | 44°F (7°C) | 54°F (12°C) | 0.7" | 1.3 | 0.0 |
| November | 51°F (10°C) | 36°F (2°C) | 43°F (6°C) | 1.1" | 8.9 | 0.0 |
| December | 42°F (5°C) | 30°F (-1°C) | 36°F (2°C) | 0.9" | 17.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.0"
12.2 days with precipitation
February 0.8"
8.3 days with precipitation
March 0.8"
7.8 days with precipitation
April 0.6"
7.1 days with precipitation
May 0.8"
6.2 days with precipitation
June 0.6"
4.5 days with precipitation
July 0.1"
1.9 days with precipitation
August 0.2"
2.2 days with precipitation
September 0.3"
3.0 days with precipitation
October 0.7"
5.8 days with precipitation
November 1.1"
10.4 days with precipitation
December 0.9"
11.5 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 4
50% probability date
Last Spring Freeze
March 27
50% probability date
Growing Season
222 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,774
Higher = more heating needed
Cooling Degree Days
853
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Mcnary Dam's climate means for you
Mcnary Dam runs 54°F a year - peaking in July, coldest in January.
- Gardeners get about 222 frost-free days, with the last spring freeze near March 27 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,774 heating and 853 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: Mcnary Dam, WA
Based on station USC00455231 feeding NOAA's 1991–2020 climate normals, Mcnary Dam, Washington averages 54°F a year, ranging from a mean daily high of 64°F to a mean daily low of 44°F. July is typically the warmest month of the year, while January is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Mcnary Dam sees about 7.8 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 222 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 27 and the first fall freeze near November 4. On the energy side, 4,774 heating degree days and 853 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Mcnary Dam scores 48/100 (Moderate), 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 July-driven heat, and deep winter brings January-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 Mcnary Dam, WA? ▼
The average annual temperature in Mcnary Dam, Washington is 54°F. The warmest month averages 89°F (32°C) and the coldest averages 30°F (-1°C).
How much rain does Mcnary Dam get? ▼
Mcnary Dam receives 7.8 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Mcnary Dam? ▼
Mcnary Dam has a climate comfort score of 48/100 (Moderate), milder than 18% of U.S. cities in the PlainClimate database.
When is the growing season in Mcnary Dam? ▼
Mcnary Dam has approximately 222 frost-free days per year, with the last spring freeze around March 27 and the first fall freeze around November 4.
How much energy does heating and cooling require in Mcnary Dam? ▼
Mcnary Dam has 4,774 heating degree days and 853 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 Mcnary Dam climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00455231 near Mcnary Dam.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00455231. 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.