Climate Comfort Score
83/100
Excellent
NOAA 1991–2020 normals 58°F annual avg Public-domain federal data
Graton, CA Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 58°F
- Avg annual temp
- 83/100
- Comfort score
- 39.9"
- Annual precip
- 238d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Graton
Graton, California averages 58°F a year and scores 83/100 on the comfort index - excellent, milder than 85% of U.S. cities.
- 58°F
- yearly average temperature, NOAA normal
- 83/100
- comfort score, milder than 85% of U.S. cities
- 39.9"
- yearly precipitation total
- 238 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
58°F (14°C)
Avg High
72°F
Avg Low
44°F
Annual Precip
39.9"
Annual Snow
0.0"
Comfort Score
83/100
Excellent
Avg Annual Temperature
58°F
30-year mean (NOAA NCEI)
Annual Precipitation
39.9"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Graton) 83.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Graton area.
How Graton compares to every U.S. city
Graton's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
83 Top 15% higher than 85% 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 Graton
MethodologyGraton'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 | 58°F (14°C) | 37°F (3°C) | 48°F (9°C) | 7.9" | 0.0" | 11.2 | 0.0 |
| February | 62°F (17°C) | 39°F (4°C) | 51°F (10°C) | 7.5" | 0.0" | 6.7 | 0.0 |
| March | 66°F (19°C) | 41°F (5°C) | 53°F (12°C) | 5.2" | 0.0" | 3.7 | 0.0 |
| April | 70°F (21°C) | 42°F (6°C) | 56°F (13°C) | 2.6" | 0.0" | 1.5 | 0.5 |
| May | 75°F (24°C) | 46°F (8°C) | 60°F (16°C) | 1.4" | 0.0" | 0.0 | 1.8 |
| June | 81°F (27°C) | 48°F (9°C) | 65°F (18°C) | 0.4" | 0.0" | 0.0 | 5.8 |
| July | 83°F (28°C) | 51°F (10°C) | 67°F (19°C) | 0.0" | 0.0" | 0.0 | 6.2 |
| August | 84°F (29°C) | 50°F (10°C) | 67°F (19°C) | 0.1" | 0.0" | 0.0 | 7.8 |
| September | 84°F (29°C) | 48°F (9°C) | 66°F (19°C) | 0.2" | 0.0" | 0.0 | 8.1 |
| October | 78°F (26°C) | 44°F (7°C) | 61°F (16°C) | 2.0" | 0.0" | 0.5 | 4.1 |
| November | 67°F (19°C) | 40°F (4°C) | 53°F (12°C) | 4.4" | 0.0" | 6.1 | 0.0 |
| December | 58°F (14°C) | 37°F (3°C) | 47°F (8°C) | 8.3" | 0.0" | 13.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 7.9"
13.2 days with precipitation
February 7.5"
11.8 days with precipitation
March 5.2"
11.1 days with precipitation
April 2.6"
7.3 days with precipitation
May 1.4"
4.1 days with precipitation
June 0.4"
1.5 days with precipitation
July 0.0"
0.4 days with precipitation
August 0.1"
0.8 days with precipitation
September 0.2"
1.5 days with precipitation
October 2.0"
4.2 days with precipitation
November 4.4"
8.8 days with precipitation
December 8.3"
13.2 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 13
50% probability date
Last Spring Freeze
March 20
50% probability date
Growing Season
238 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,927
Higher = more heating needed
Cooling Degree Days
327
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What Graton's climate means for you
Graton runs 58°F a year - peaking in August, coldest in December.
- Gardeners get about 238 frost-free days, with the last spring freeze near March 20 - plan the planting calendar around it, not the regional average.
- Energy bills track 2,927 heating and 327 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: Graton, CA
In Graton, California, the NOAA 1991–2020 climate normals put the annual average temperature at 58°F, ranging from a mean daily high of 72°F to a mean daily low of 44°F. August is typically the warmest month of the year, while December is the coldest. As thirty-year averages computed from station USC00043578, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Graton averages 39.9 inches of precipitation a year, with negligible snowfall, and that matters as much to daily life here as temperature does. The frost-free season averages 238 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 20 and the first fall freeze near November 13. As for energy demand, 2,927 heating degree days and 327 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Graton scores 83/100 (Excellent), 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 Graton, CA? ▼
The average annual temperature in Graton, California is 58°F. The warmest month averages 84°F (29°C) and the coldest averages 37°F (3°C).
How much rain does Graton get? ▼
Graton receives 39.9 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Graton? ▼
Graton has a climate comfort score of 83/100 (Excellent), milder than 85% of U.S. cities in the PlainClimate database.
When is the growing season in Graton? ▼
Graton has approximately 238 frost-free days per year, with the last spring freeze around March 20 and the first fall freeze around November 13.
How much energy does heating and cooling require in Graton? ▼
Graton has 2,927 heating degree days and 327 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 Graton climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00043578 near Graton.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00043578. 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.