Climate Comfort Score
85/100
Excellent
NOAA 1991–2020 normals 63°F annual avg Public-domain federal data
- 63°F
- Avg annual temp
- 85/100
- Comfort score
- 16.1"
- Annual precip
- 315d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Alpine
Alpine, California averages 63°F a year and scores 85/100 on the comfort index - excellent, milder than 89% of U.S. cities.
- 63°F
- average temperature, NOAA 1991-2020 normal
- 85/100
- comfort score, milder than 89% of U.S. cities
- 16.1"
- annual precipitation
- 315 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
63°F (17°C)
Avg High
75°F
Avg Low
51°F
Annual Precip
16.1"
Comfort Score
85/100
Excellent
Avg Annual Temperature
63°F
30-year mean (NOAA NCEI)
Annual Precipitation
16.1"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Alpine) 85.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Alpine area.
How Alpine compares to every U.S. city
Alpine's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
85 Top 11% higher than 89% 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 Alpine
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Alpine, the NOAA 1991-2020 normal captures average conditions across that spread - notably, the most recent decade runs warmer than the 30-year mean itself.
- 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 | 64°F (18°C) | 43°F (6°C) | 53°F (12°C) | 3.2" | 0.6 | 0.0 |
| February | 64°F (18°C) | 42°F (6°C) | 53°F (12°C) | 3.6" | 0.9 | 0.0 |
| March | 67°F (20°C) | 44°F (7°C) | 56°F (13°C) | 2.7" | 0.2 | 0.1 |
| April | 71°F (22°C) | 47°F (8°C) | 59°F (15°C) | 1.2" | 0.1 | 1.0 |
| May | 74°F (24°C) | 51°F (10°C) | 63°F (17°C) | 0.6" | 0.0 | 1.9 |
| June | 81°F (27°C) | 54°F (12°C) | 68°F (20°C) | 0.1" | 0.0 | 4.8 |
| July | 87°F (30°C) | 60°F (16°C) | 73°F (23°C) | 0.1" | 0.0 | 12.2 |
| August | 89°F (32°C) | 62°F (17°C) | 76°F (24°C) | 0.1" | 0.0 | 16.8 |
| September | 86°F (30°C) | 60°F (16°C) | 73°F (23°C) | 0.3" | 0.0 | 12.8 |
| October | 78°F (26°C) | 54°F (12°C) | 66°F (19°C) | 0.6" | 0.0 | 5.0 |
| November | 71°F (21°C) | 48°F (9°C) | 59°F (15°C) | 1.5" | 0.1 | 0.4 |
| December | 63°F (17°C) | 42°F (5°C) | 52°F (11°C) | 2.0" | 1.3 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 3.2"
5.9 days with precipitation
February 3.6"
8.0 days with precipitation
March 2.7"
5.8 days with precipitation
April 1.2"
4.3 days with precipitation
May 0.6"
2.8 days with precipitation
June 0.1"
0.7 days with precipitation
July 0.1"
0.9 days with precipitation
August 0.1"
0.7 days with precipitation
September 0.3"
1.0 days with precipitation
October 0.6"
2.4 days with precipitation
November 1.5"
4.1 days with precipitation
December 2.0"
6.1 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 24
50% probability date
Last Spring Freeze
February 12
50% probability date
Growing Season
315 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,028
Higher = more heating needed
Cooling Degree Days
1,167
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What Alpine's climate means for you
Alpine runs 63°F a year - peaking in August, coldest in December.
- Gardeners get about 315 frost-free days, with the last spring freeze near February 12 - plan the planting calendar around it, not the regional average.
- Energy bills track 2,028 heating and 1,167 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: Alpine, CA
An annual average temperature of 63°F, ranging from a mean daily high of 75°F to a mean daily low of 51°F is what the NOAA 1991–2020 climate normals report for Alpine, California. August is typically the warmest month of the year, while December is the coldest. That baseline comes from station USC00040136 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Beyond temperature, Alpine averages 16.1 inches of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 315 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near February 12 and the first fall freeze near December 24. Turning to energy use, 2,028 heating degree days and 1,167 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Alpine scores 85/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, August-driven heat peaks in summer, and December-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in Alpine, CA? ▼
The average annual temperature in Alpine, California is 63°F. The warmest month averages 89°F (32°C) and the coldest averages 42°F (5°C).
How much rain does Alpine get? ▼
Alpine receives 16.1 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Alpine? ▼
Alpine has a climate comfort score of 85/100 (Excellent), milder than 89% of U.S. cities in the PlainClimate database.
When is the growing season in Alpine? ▼
Alpine has approximately 315 frost-free days per year, with the last spring freeze around February 12 and the first fall freeze around December 24.
How much energy does heating and cooling require in Alpine? ▼
Alpine has 2,028 heating degree days and 1,167 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 Alpine climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00040136 near Alpine.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00040136. 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.