Climate Comfort Score
97/100
Excellent
NOAA 1991–2020 normals 60°F annual avg Public-domain federal data
Napa State Hospital, CA Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 60°F
- Avg annual temp
- 97/100
- Comfort score
- 26.7"
- Annual precip
- 295d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Napa State Hospital
Napa State Hospital, California averages 60°F a year and scores 97/100 on the comfort index - excellent, milder than 98% of U.S. cities.
- 60°F
- annual average temperature (NOAA normal)
- 97/100
- comfort score, milder than 98% of U.S. cities
- 26.7"
- annual precipitation
- 295 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
60°F (16°C)
Avg High
73°F
Avg Low
48°F
Annual Precip
26.7"
Annual Snow
0.0"
Comfort Score
97/100
Excellent
Avg Annual Temperature
60°F
30-year mean (NOAA NCEI)
Annual Precipitation
26.7"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Napa State Hospital) 97.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Napa State Hospital area.
How Napa State Hospital compares to every U.S. city
Napa State Hospital's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
97 Top 2% higher than 98% 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 Napa State Hospital
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Napa State Hospital 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 59°F (15°C) | 40°F (5°C) | 49°F (10°C) | 5.0" | 0.0" | 4.5 | 0.0 |
| February | 63°F (17°C) | 42°F (5°C) | 53°F (11°C) | 5.1" | 0.0" | 1.7 | 0.0 |
| March | 68°F (20°C) | 44°F (6°C) | 56°F (13°C) | 3.7" | 0.0" | 0.3 | 0.0 |
| April | 72°F (22°C) | 46°F (8°C) | 59°F (15°C) | 1.7" | 0.0" | 0.1 | 0.7 |
| May | 77°F (25°C) | 50°F (10°C) | 63°F (17°C) | 1.1" | 0.0" | 0.0 | 2.6 |
| June | 82°F (28°C) | 54°F (12°C) | 68°F (20°C) | 0.3" | 0.0" | 0.0 | 6.0 |
| July | 83°F (29°C) | 56°F (13°C) | 69°F (21°C) | 0.0" | 0.0" | 0.0 | 5.6 |
| August | 84°F (29°C) | 56°F (13°C) | 70°F (21°C) | 0.1" | 0.0" | 0.0 | 6.4 |
| September | 84°F (29°C) | 53°F (12°C) | 69°F (21°C) | 0.1" | 0.0" | 0.0 | 8.3 |
| October | 78°F (26°C) | 49°F (10°C) | 64°F (18°C) | 1.3" | 0.0" | 0.0 | 2.9 |
| November | 66°F (19°C) | 44°F (6°C) | 55°F (13°C) | 2.8" | 0.0" | 0.8 | 0.0 |
| December | 59°F (15°C) | 40°F (4°C) | 49°F (10°C) | 5.5" | 0.0" | 4.9 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 5.0"
12.0 days with precipitation
February 5.1"
10.8 days with precipitation
March 3.7"
9.6 days with precipitation
April 1.7"
6.5 days with precipitation
May 1.1"
3.7 days with precipitation
June 0.3"
1.1 days with precipitation
July 0.0"
0.0 days with precipitation
August 0.1"
0.2 days with precipitation
September 0.1"
1.0 days with precipitation
October 1.3"
3.6 days with precipitation
November 2.8"
8.2 days with precipitation
December 5.5"
11.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 4
50% probability date
Last Spring Freeze
February 12
50% probability date
Growing Season
295 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,358
Higher = more heating needed
Cooling Degree Days
643
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What Napa State Hospital's climate means for you
Napa State Hospital runs 60°F a year - peaking in August, coldest in December.
- Gardeners get about 295 frost-free days, with the last spring freeze near February 12 - plan the planting calendar around it, not the regional average.
- Energy bills track 2,358 heating and 643 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: Napa State Hospital, CA
Based on station USC00046074 feeding NOAA's 1991–2020 climate normals, Napa State Hospital, California averages 60°F a year, ranging from a mean daily high of 73°F to a mean daily low of 48°F. August is typically the warmest month of the year, while December is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Anyone planning to live, garden, or travel in Napa State Hospital should weigh precipitation alongside temperature: the annual average runs 26.7 inches, with negligible snowfall. The frost-free season averages 295 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 4. And on the energy front, 2,358 heating degree days and 643 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Napa State Hospital scores 97/100 (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 Napa State Hospital, CA? ▼
The average annual temperature in Napa State Hospital, California is 60°F. The warmest month averages 84°F (29°C) and the coldest averages 40°F (4°C).
How much rain does Napa State Hospital get? ▼
Napa State Hospital receives 26.7 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Napa State Hospital? ▼
Napa State Hospital has a climate comfort score of 97/100 (Excellent), milder than 98% of U.S. cities in the PlainClimate database.
When is the growing season in Napa State Hospital? ▼
Napa State Hospital has approximately 295 frost-free days per year, with the last spring freeze around February 12 and the first fall freeze around December 4.
How much energy does heating and cooling require in Napa State Hospital? ▼
Napa State Hospital has 2,358 heating degree days and 643 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 Napa State Hospital climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00046074 near Napa State Hospital.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00046074. 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.