Climate Comfort Score
64/100
Good
NOAA 1991–2020 normals 54°F annual avg Public-domain federal data
Copco #1 Dam, CA Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 54°F
- Avg annual temp
- 64/100
- Comfort score
- 20.4"
- Annual precip
- 170d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Copco #1 Dam
Copco #1 Dam, California averages 54°F a year and scores 64/100 on the comfort index - good, milder than 51% of U.S. cities.
- 54°F
- annual average temperature (NOAA normal)
- 64/100
- comfort score, milder than 51% of U.S. cities
- 20.4"
- annual precipitation · 15" snow
- 170 days
- frost-free 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
69°F
Avg Low
39°F
Annual Precip
20.4"
Annual Snow
14.5"
Comfort Score
64/100
Good
Avg Annual Temperature
54°F
30-year mean (NOAA NCEI)
Annual Precipitation
20.4"
Plus 14.5" of snow
Comfort score vs national 100-point ceiling (Copco #1 Dam) 64.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Copco #1 Dam area.
How Copco #1 Dam compares to every U.S. city
Copco #1 Dam's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
64 Top 49% higher than 51% 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 Copco #1 Dam
MethodologyCopco #1 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 48°F (9°C) | 27°F (-3°C) | 37°F (3°C) | 3.4" | 4.7" | 26.4 | 0.0 |
| February | 53°F (12°C) | 29°F (-2°C) | 41°F (5°C) | 2.3" | 2.7" | 21.1 | 0.0 |
| March | 58°F (15°C) | 32°F (0°C) | 45°F (7°C) | 2.0" | 0.6" | 14.8 | 0.0 |
| April | 64°F (18°C) | 35°F (2°C) | 50°F (10°C) | 1.7" | 0.6" | 8.8 | 0.0 |
| May | 74°F (23°C) | 42°F (5°C) | 58°F (14°C) | 1.4" | 0.0" | 2.5 | 1.1 |
| June | 82°F (28°C) | 49°F (9°C) | 65°F (19°C) | 0.9" | 0.0" | 0.6 | 9.8 |
| July | 93°F (34°C) | 56°F (13°C) | 74°F (24°C) | 0.5" | 0.0" | 0.0 | 22.7 |
| August | 93°F (34°C) | 55°F (13°C) | 74°F (23°C) | 0.3" | 0.0" | 0.0 | 25.7 |
| September | 85°F (30°C) | 49°F (9°C) | 67°F (19°C) | 0.5" | 0.0" | 0.0 | 13.1 |
| October | 70°F (21°C) | 39°F (4°C) | 54°F (12°C) | 1.4" | 0.0" | 4.4 | 1.1 |
| November | 56°F (13°C) | 32°F (0°C) | 44°F (7°C) | 2.7" | 1.5" | 15.3 | 0.0 |
| December | 47°F (8°C) | 26°F (-3°C) | 36°F (2°C) | 3.5" | 4.4" | 24.9 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 3.4"
Snow: 4.7"
13.2 days with precipitation
February 2.3"
Snow: 2.7"
10.3 days with precipitation
March 2.0"
Snow: 0.6"
11.6 days with precipitation
April 1.7"
Snow: 0.6"
10.5 days with precipitation
May 1.4"
7.8 days with precipitation
June 0.9"
3.9 days with precipitation
July 0.5"
1.8 days with precipitation
August 0.3"
1.7 days with precipitation
September 0.5"
2.7 days with precipitation
October 1.4"
5.9 days with precipitation
November 2.7"
Snow: 1.5"
11.0 days with precipitation
December 3.5"
Snow: 4.4"
13.2 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 21
50% probability date
Last Spring Freeze
May 4
50% probability date
Growing Season
170 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,895
Higher = more heating needed
Cooling Degree Days
852
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Copco #1 Dam's climate means for you
Copco #1 Dam runs 54°F a year - peaking in July, coldest in December.
- Gardeners get about 170 frost-free days, with the last spring freeze near May 4 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,895 heating and 852 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: Copco #1 Dam, CA
Based on station USC00041990 feeding NOAA's 1991–2020 climate normals, Copco #1 Dam, California averages 54°F a year, ranging from a mean daily high of 69°F to a mean daily low of 39°F. July is typically the warmest month of the year, while December 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.
Copco #1 Dam averages 20.4 inches of precipitation a year, with 14.5 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 170 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 4 and the first fall freeze near October 21. As for energy demand, 4,895 heating degree days and 852 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Copco #1 Dam scores 64/100 (Good), 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 Copco #1 Dam, CA? ▼
The average annual temperature in Copco #1 Dam, California is 54°F. The warmest month averages 93°F (34°C) and the coldest averages 26°F (-3°C).
How much rain does Copco #1 Dam get? ▼
Copco #1 Dam receives 20.4 inches of precipitation annually, including 14.5 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Copco #1 Dam? ▼
Copco #1 Dam has a climate comfort score of 64/100 (Good), milder than 51% of U.S. cities in the PlainClimate database.
When is the growing season in Copco #1 Dam? ▼
Copco #1 Dam has approximately 170 frost-free days per year, with the last spring freeze around May 4 and the first fall freeze around October 21.
How much energy does heating and cooling require in Copco #1 Dam? ▼
Copco #1 Dam has 4,895 heating degree days and 852 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 Copco #1 Dam climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00041990 near Copco #1 Dam.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00041990. 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.