Climate Comfort Score
75/100
Good
NOAA 1991–2020 normals 74°F annual avg Public-domain federal data
Imperial CO, CA Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 74°F
- Avg annual temp
- 75/100
- Comfort score
- 2.4"
- Annual precip
- 344d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Imperial CO
Imperial CO, California averages 74°F a year and scores 75/100 on the comfort index - good, milder than 72% of U.S. cities.
- 74°F
- annual average temperature (NOAA normal)
- 75/100
- comfort score, milder than 72% of U.S. cities
- 2.4"
- yearly precipitation total
- 344 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
74°F (23°C)
Avg High
89°F
Avg Low
59°F
Annual Precip
2.4"
Comfort Score
75/100
Good
Avg Annual Temperature
74°F
30-year mean (NOAA NCEI)
Annual Precipitation
2.4"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Imperial CO) 75.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Imperial CO area.
How Imperial CO compares to every U.S. city
Imperial CO's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
75 Top 28% higher than 72% 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 Imperial CO
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Imperial CO 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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 71°F (21°C) | 42°F (5°C) | 56°F (13°C) | 0.4" | 1.3 | 0.0 |
| February | 74°F (23°C) | 45°F (7°C) | 59°F (15°C) | 0.4" | 0.7 | 0.0 |
| March | 80°F (27°C) | 51°F (10°C) | 65°F (19°C) | 0.3" | 0.0 | 5.2 |
| April | 86°F (30°C) | 56°F (13°C) | 71°F (22°C) | 0.1" | 0.0 | 11.1 |
| May | 94°F (35°C) | 62°F (17°C) | 78°F (26°C) | 0.1" | 0.0 | 23.2 |
| June | 104°F (40°C) | 70°F (21°C) | 87°F (30°C) | 0.0" | 0.0 | 29.8 |
| July | 108°F (42°C) | 78°F (26°C) | 93°F (34°C) | 0.1" | 0.0 | 31.0 |
| August | 108°F (42°C) | 79°F (26°C) | 94°F (34°C) | 0.1" | 0.0 | 30.9 |
| September | 102°F (39°C) | 72°F (22°C) | 87°F (31°C) | 0.2" | 0.0 | 28.7 |
| October | 90°F (32°C) | 60°F (16°C) | 75°F (24°C) | 0.2" | 0.0 | 19.1 |
| November | 78°F (26°C) | 48°F (9°C) | 63°F (17°C) | 0.2" | 0.3 | 2.1 |
| December | 69°F (20°C) | 41°F (5°C) | 55°F (13°C) | 0.3" | 1.8 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 0.4"
2.4 days with precipitation
February 0.4"
1.9 days with precipitation
March 0.3"
1.3 days with precipitation
April 0.1"
0.7 days with precipitation
May 0.1"
0.2 days with precipitation
June 0.0"
0.0 days with precipitation
July 0.1"
0.6 days with precipitation
August 0.1"
1.0 days with precipitation
September 0.2"
0.7 days with precipitation
October 0.2"
1.0 days with precipitation
November 0.2"
1.0 days with precipitation
December 0.3"
1.9 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 24
50% probability date
Last Spring Freeze
January 14
50% probability date
Growing Season
344 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
967
Higher = more heating needed
Cooling Degree Days
4,162
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 45% | 5.8 | 70% | 8% |
| February | 42% | 7.5 | 68% | 8% |
| March | 35% | 8.7 | 77% | 4% |
| April | 30% | 9.6 | 80% | 2% |
| May | 28% | 8.8 | 82% | 2% |
| June | 27% | 8.2 | 84% | 1% |
| July | 34% | 7.5 | 77% | 2% |
| August | 36% | 6.7 | 76% | 2% |
| September | 32% | 6.6 | 85% | 1% |
| October | 35% | 6.0 | 81% | 2% |
| November | 42% | 5.3 | 75% | 6% |
| December | 46% | 5.0 | 70% | 10% |
What Imperial CO's climate means for you
Imperial CO runs 74°F a year - peaking in August, coldest in December.
- Gardeners get about 344 frost-free days, with the last spring freeze near January 14 - plan the planting calendar around it, not the regional average.
- Energy bills track 967 heating and 4,162 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: Imperial CO, CA
An annual average temperature of 74°F, ranging from a mean daily high of 89°F to a mean daily low of 59°F is what the NOAA 1991–2020 climate normals report for Imperial CO, California. August is typically the warmest month of the year, while December is the coldest. That baseline comes from station USW00003144 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Imperial CO averages 2.4 inches of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. The frost-free season averages 344 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near January 14 and the first fall freeze near December 24. As for energy demand, 967 heating degree days and 4,162 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Imperial CO scores 75/100 (Good), 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 December-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 Imperial CO, CA? ▼
The average annual temperature in Imperial CO, California is 74°F. The warmest month averages 108°F (42°C) and the coldest averages 41°F (5°C).
How much rain does Imperial CO get? ▼
Imperial CO receives 2.4 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Imperial CO? ▼
Imperial CO has a climate comfort score of 75/100 (Good), milder than 72% of U.S. cities in the PlainClimate database.
When is the growing season in Imperial CO? ▼
Imperial CO has approximately 344 frost-free days per year, with the last spring freeze around January 14 and the first fall freeze around December 24.
How much energy does heating and cooling require in Imperial CO? ▼
Imperial CO has 967 heating degree days and 4,162 cooling degree days annually, a cooling-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 Imperial CO climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00003144 near Imperial CO.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00003144. 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.