Climate Comfort Score
72/100
Good
NOAA 1991–2020 normals 53°F annual avg Public-domain federal data
Arcata Eureka, CA Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 53°F
- Avg annual temp
- 72/100
- Comfort score
- 46.1"
- Annual precip
- 267d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Arcata Eureka
Arcata Eureka, California averages 53°F a year and scores 72/100 on the comfort index - good, milder than 66% of U.S. cities.
- 53°F
- average temperature, NOAA 1991-2020 normal
- 72/100
- comfort score, milder than 66% of U.S. cities
- 46.1"
- annual precipitation
- 267 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
53°F (11°C)
Avg High
60°F
Avg Low
45°F
Annual Precip
46.1"
Comfort Score
72/100
Good
Avg Annual Temperature
53°F
30-year mean (NOAA NCEI)
Annual Precipitation
46.1"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Arcata Eureka) 72.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Arcata Eureka area.
How Arcata Eureka compares to every U.S. city
Arcata Eureka'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 Arcata Eureka
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Arcata Eureka 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 | 56°F (14°C) | 41°F (5°C) | 48°F (9°C) | 7.5" | 4.3 | 0.0 |
| February | 57°F (14°C) | 41°F (5°C) | 49°F (9°C) | 6.5" | 3.8 | 0.0 |
| March | 57°F (14°C) | 41°F (5°C) | 49°F (9°C) | 6.3" | 2.1 | 0.0 |
| April | 58°F (14°C) | 43°F (6°C) | 50°F (10°C) | 4.1" | 0.8 | 0.0 |
| May | 60°F (15°C) | 46°F (8°C) | 53°F (12°C) | 2.1" | 0.1 | 0.0 |
| June | 63°F (17°C) | 49°F (9°C) | 56°F (13°C) | 1.0" | 0.0 | 0.0 |
| July | 63°F (17°C) | 51°F (11°C) | 57°F (14°C) | 0.2" | 0.0 | 0.0 |
| August | 65°F (18°C) | 51°F (11°C) | 58°F (14°C) | 0.3" | 0.0 | 0.0 |
| September | 65°F (18°C) | 49°F (9°C) | 57°F (14°C) | 0.8" | 0.0 | 0.1 |
| October | 64°F (18°C) | 45°F (7°C) | 54°F (12°C) | 2.7" | 0.1 | 0.0 |
| November | 59°F (15°C) | 42°F (6°C) | 51°F (10°C) | 5.7" | 2.3 | 0.0 |
| December | 56°F (13°C) | 40°F (4°C) | 48°F (9°C) | 8.9" | 5.5 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 7.5"
18.4 days with precipitation
February 6.5"
17.6 days with precipitation
March 6.3"
17.7 days with precipitation
April 4.1"
14.5 days with precipitation
May 2.1"
10.7 days with precipitation
June 1.0"
6.3 days with precipitation
July 0.2"
4.7 days with precipitation
August 0.3"
5.7 days with precipitation
September 0.8"
9.0 days with precipitation
October 2.7"
11.8 days with precipitation
November 5.7"
17.2 days with precipitation
December 8.9"
19.3 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 30
50% probability date
Last Spring Freeze
March 8
50% probability date
Growing Season
267 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,576
Higher = more heating needed
Cooling Degree Days
5
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 | 81% | 6.1 | 38% | 39% |
| February | 82% | 6.8 | 35% | 41% |
| March | 82% | 7.1 | 35% | 35% |
| April | 84% | 6.9 | 38% | 37% |
| May | 87% | 6.6 | 39% | 34% |
| June | 86% | 6.3 | 49% | 27% |
| July | 89% | 5.4 | 47% | 29% |
| August | 87% | 5.1 | 55% | 18% |
| September | 85% | 4.8 | 49% | 29% |
| October | 84% | 5.1 | 43% | 32% |
| November | 82% | 5.9 | 41% | 35% |
| December | 82% | 6.2 | 38% | 39% |
What Arcata Eureka's climate means for you
Arcata Eureka runs 53°F a year - peaking in August, coldest in December.
- Gardeners get about 267 frost-free days, with the last spring freeze near March 8 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,576 heating and 5 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: Arcata Eureka, CA
In Arcata Eureka, California, the NOAA 1991–2020 climate normals put the annual average temperature at 53°F, ranging from a mean daily high of 60°F to a mean daily low of 45°F. August is typically the warmest month of the year, while December is the coldest. As thirty-year averages computed from station USW00024283, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Arcata Eureka sees about 46.1 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 267 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 8 and the first fall freeze near November 30. On the energy side, 4,576 heating degree days and 5 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Arcata Eureka scores 72/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, August-driven heat at the peak of summer, and December-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Arcata Eureka, CA? ▼
The average annual temperature in Arcata Eureka, California is 53°F. The warmest month averages 65°F (18°C) and the coldest averages 40°F (4°C).
How much rain does Arcata Eureka get? ▼
Arcata Eureka receives 46.1 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Arcata Eureka? ▼
Arcata Eureka 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 Arcata Eureka? ▼
Arcata Eureka has approximately 267 frost-free days per year, with the last spring freeze around March 8 and the first fall freeze around November 30.
How much energy does heating and cooling require in Arcata Eureka? ▼
Arcata Eureka has 4,576 heating degree days and 5 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 Arcata Eureka climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00024283 near Arcata Eureka.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00024283. 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.