Climate Comfort Score
72/100
Good
NOAA 1991–2020 normals 64°F annual avg Public-domain federal data
North Island, CA Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 64°F
- Avg annual temp
- 72/100
- Comfort score
- 9.3"
- Annual precip
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for North Island
North Island, California averages 64°F a year and scores 72/100 on the comfort index - good, milder than 66% of U.S. cities.
- 64°F
- annual average temperature (NOAA normal)
- 72/100
- comfort score, milder than 66% of U.S. cities
- 9.3"
- precipitation, annual total
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
64°F (18°C)
Avg High
71°F
Avg Low
57°F
Annual Precip
9.3"
Annual Snow
0.0"
Comfort Score
72/100
Good
Avg Annual Temperature
64°F
30-year mean (NOAA NCEI)
Annual Precipitation
9.3"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (North Island) 72.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the North Island area.
How North Island compares to every U.S. city
North Island's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
72 Top 34% higher than 66% 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 North Island
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. North Island's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs 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 | 66°F (19°C) | 49°F (9°C) | 58°F (14°C) | 1.7" | 0.0" | 0.0 | 0.0 |
| February | 66°F (19°C) | 51°F (10°C) | 58°F (15°C) | 1.9" | 0.0" | 0.0 | 0.1 |
| March | 67°F (19°C) | 53°F (12°C) | 60°F (16°C) | 1.4" | 0.0" | 0.0 | 0.1 |
| April | 68°F (20°C) | 55°F (13°C) | 62°F (17°C) | 0.6" | 0.0" | 0.0 | 0.1 |
| May | 69°F (21°C) | 59°F (15°C) | 64°F (18°C) | 0.5" | 0.0" | 0.0 | 0.1 |
| June | 71°F (22°C) | 62°F (17°C) | 66°F (19°C) | 0.1" | 0.0" | 0.0 | 0.0 |
| July | 74°F (24°C) | 65°F (18°C) | 70°F (21°C) | 0.1" | 0.0" | 0.0 | 0.0 |
| August | 77°F (25°C) | 67°F (19°C) | 72°F (22°C) | 0.0" | 0.0" | 0.0 | 0.3 |
| September | 77°F (25°C) | 65°F (18°C) | 71°F (22°C) | 0.2" | 0.0" | 0.0 | 0.9 |
| October | 75°F (24°C) | 60°F (16°C) | 67°F (20°C) | 0.6" | 0.0" | 0.0 | 1.3 |
| November | 71°F (21°C) | 54°F (12°C) | 62°F (17°C) | 0.8" | 0.0" | 0.0 | 0.6 |
| December | 66°F (19°C) | 49°F (9°C) | 57°F (14°C) | 1.5" | 0.0" | 0.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 1.7"
7.3 days with precipitation
February 1.9"
7.5 days with precipitation
March 1.4"
5.7 days with precipitation
April 0.6"
3.1 days with precipitation
May 0.5"
1.7 days with precipitation
June 0.1"
0.7 days with precipitation
July 0.1"
0.6 days with precipitation
August 0.0"
0.4 days with precipitation
September 0.2"
0.9 days with precipitation
October 0.6"
2.8 days with precipitation
November 0.8"
4.1 days with precipitation
December 1.5"
6.7 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,144
Higher = more heating needed
Cooling Degree Days
760
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 | 65% | 5.5 | 18% | 10% |
| February | 66% | 6.7 | 12% | 13% |
| March | 67% | 6.9 | 13% | 15% |
| April | 68% | 7.1 | 13% | 13% |
| May | 72% | 7.0 | 10% | 14% |
| June | 74% | 6.8 | 10% | 7% |
| July | 75% | 6.8 | 3% | 7% |
| August | 74% | 6.9 | 7% | 4% |
| September | 72% | 6.0 | 16% | 12% |
| October | 66% | 5.2 | 23% | 9% |
| November | 64% | 5.0 | 21% | 7% |
| December | 63% | 5.1 | 16% | 10% |
Nearby Cities
San Diego Lindbergh Fld, CA
65°F avg · 67/100 comfort
San Diego Seaworld, CA
62°F avg · 77/100 comfort
Chula Vista, CA
63°F avg · 72/100 comfort
San Diego Montgomery Fld, CA
64°F avg · 77/100 comfort
Imperial Beach Ream Fld, CA
62°F avg · 67/100 comfort
San Diego Miramar, CA
64°F avg · 77/100 comfort
What North Island's climate means for you
North Island runs 64°F a year - peaking in August, coldest in December.
- Energy bills track 1,144 heating and 760 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: North Island, CA
In North Island, California, the NOAA 1991–2020 climate normals put the annual average temperature at 64°F, ranging from a mean daily high of 71°F to a mean daily low of 57°F. August is typically the warmest month of the year, while December is the coldest. As thirty-year averages computed from station USW00093112, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Anyone planning to live, garden, or travel in North Island should weigh precipitation alongside temperature: the annual average runs 9.3 inches, with negligible snowfall. Growing-season length varies with elevation and microclimate. And on the energy front, 1,144 heating degree days and 760 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, North Island scores 72/100 (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 North Island, CA? ▼
The average annual temperature in North Island, California is 64°F. The warmest month averages 77°F (25°C) and the coldest averages 49°F (9°C).
How much rain does North Island get? ▼
North Island receives 9.3 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for North Island? ▼
North Island has a climate comfort score of 72/100 (Good), milder than 66% of U.S. cities in the PlainClimate database.
When is the growing season in North Island? ▼
Growing season data is not available for North Island.
How much energy does heating and cooling require in North Island? ▼
North Island has 1,144 heating degree days and 760 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 North Island climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00093112 near North Island.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00093112. 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.