Climate Comfort Score
90/100
Excellent
NOAA 1991–2020 normals 65°F annual avg Public-domain federal data
EL Cajon, CA Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 65°F
- Avg annual temp
- 90/100
- Comfort score
- 11.6"
- Annual precip
- 349d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for EL Cajon
EL Cajon, California averages 65°F a year and scores 90/100 on the comfort index - excellent, milder than 94% of U.S. cities.
- 65°F
- yearly average temperature, NOAA normal
- 90/100
- comfort score, milder than 94% of U.S. cities
- 11.6"
- yearly precipitation total
- 349 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
65°F (18°C)
Avg High
77°F
Avg Low
53°F
Annual Precip
11.6"
Annual Snow
0.0"
Comfort Score
90/100
Excellent
Avg Annual Temperature
65°F
30-year mean (NOAA NCEI)
Annual Precipitation
11.6"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (EL Cajon) 90.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the EL Cajon area.
How EL Cajon compares to every U.S. city
EL Cajon's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
90 Top 6% higher than 94% 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 EL Cajon
MethodologyEL Cajon'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 | 69°F (21°C) | 43°F (6°C) | 56°F (13°C) | 2.3" | 0.0" | 0.8 | 0.1 |
| February | 69°F (21°C) | 44°F (7°C) | 57°F (14°C) | 2.6" | 0.0" | 0.3 | 0.3 |
| March | 71°F (22°C) | 48°F (9°C) | 60°F (15°C) | 1.9" | 0.0" | 0.0 | 0.8 |
| April | 75°F (24°C) | 51°F (10°C) | 63°F (17°C) | 0.8" | 0.0" | 0.0 | 1.9 |
| May | 76°F (25°C) | 56°F (13°C) | 66°F (19°C) | 0.3" | 0.0" | 0.0 | 2.5 |
| June | 81°F (27°C) | 59°F (15°C) | 70°F (21°C) | 0.1" | 0.0" | 0.0 | 3.6 |
| July | 86°F (30°C) | 63°F (17°C) | 75°F (24°C) | 0.2" | 0.0" | 0.0 | 9.9 |
| August | 89°F (31°C) | 65°F (18°C) | 77°F (25°C) | 0.0" | 0.0" | 0.0 | 15.1 |
| September | 87°F (31°C) | 62°F (17°C) | 75°F (24°C) | 0.1" | 0.0" | 0.0 | 13.5 |
| October | 81°F (27°C) | 56°F (13°C) | 68°F (20°C) | 0.5" | 0.0" | 0.0 | 6.9 |
| November | 75°F (24°C) | 47°F (8°C) | 61°F (16°C) | 1.0" | 0.0" | 0.2 | 2.2 |
| December | 69°F (20°C) | 42°F (5°C) | 55°F (13°C) | 1.8" | 0.0" | 1.2 | 0.1 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 2.3"
5.6 days with precipitation
February 2.6"
7.0 days with precipitation
March 1.9"
5.1 days with precipitation
April 0.8"
3.5 days with precipitation
May 0.3"
2.2 days with precipitation
June 0.1"
0.6 days with precipitation
July 0.2"
0.6 days with precipitation
August 0.0"
0.4 days with precipitation
September 0.1"
0.6 days with precipitation
October 0.5"
1.7 days with precipitation
November 1.0"
3.4 days with precipitation
December 1.8"
5.5 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 21
50% probability date
Last Spring Freeze
January 6
50% probability date
Growing Season
349 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,309
Higher = more heating needed
Cooling Degree Days
1,377
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What EL Cajon's climate means for you
EL Cajon runs 65°F a year - peaking in August, coldest in December.
- Gardeners get about 349 frost-free days, with the last spring freeze near January 6 - plan the planting calendar around it, not the regional average.
- Energy bills track 1,309 heating and 1,377 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: EL Cajon, CA
The NOAA 1991–2020 climate normals describe EL Cajon, California as a location with an annual average temperature of 65°F, ranging from a mean daily high of 77°F to a mean daily low of 53°F. August is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00042706, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Anyone planning to live, garden, or travel in EL Cajon should weigh precipitation alongside temperature: the annual average runs 11.6 inches, with negligible snowfall. The frost-free season averages 349 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near January 6 and the first fall freeze near December 21. And on the energy front, 1,309 heating degree days and 1,377 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, EL Cajon scores 90/100 (Excellent), 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 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 EL Cajon, CA? ▼
The average annual temperature in EL Cajon, California is 65°F. The warmest month averages 89°F (31°C) and the coldest averages 42°F (5°C).
How much rain does EL Cajon get? ▼
EL Cajon receives 11.6 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for EL Cajon? ▼
EL Cajon has a climate comfort score of 90/100 (Excellent), milder than 94% of U.S. cities in the PlainClimate database.
When is the growing season in EL Cajon? ▼
EL Cajon has approximately 349 frost-free days per year, with the last spring freeze around January 6 and the first fall freeze around December 21.
How much energy does heating and cooling require in EL Cajon? ▼
EL Cajon has 1,309 heating degree days and 1,377 cooling degree days annually, a fairly balanced heating/cooling split. 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 EL Cajon climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00042706 near EL Cajon.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00042706. 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.