Climate Comfort Score
44/100
Moderate
NOAA 1991–2020 normals 39°F annual avg Public-domain federal data
- 39°F
- Avg annual temp
- 44/100
- Comfort score
- 47.1"
- Annual precip
- 99d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Alta
Alta, Utah averages 39°F a year and scores 44/100 on the comfort index - moderate, milder than 8% of U.S. cities.
- 39°F
- annual average temperature (NOAA normal)
- 44/100
- comfort score, milder than 8% of U.S. cities
- 47.1"
- annual precipitation · 458" snow
- 99 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
39°F (4°C)
Avg High
48°F
Avg Low
30°F
Annual Precip
47.1"
Annual Snow
458.3"
Comfort Score
44/100
Moderate
Avg Annual Temperature
39°F
30-year mean (NOAA NCEI)
Annual Precipitation
47.1"
Plus 458.3" of snow
Comfort score vs national 100-point ceiling (Alta) 44.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Alta area.
How Alta compares to every U.S. city
Alta's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 Top 92% higher than 8% 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 Alta
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Alta 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 | 31°F (-1°C) | 15°F (-9°C) | 23°F (-5°C) | 6.4" | 74.7" | 30.9 | 0.0 |
| February | 31°F (-1°C) | 15°F (-9°C) | 23°F (-5°C) | 5.4" | 81.2" | 27.8 | 0.0 |
| March | 37°F (3°C) | 20°F (-7°C) | 29°F (-2°C) | 6.2" | 71.4" | 29.0 | 0.0 |
| April | 42°F (6°C) | 25°F (-4°C) | 34°F (1°C) | 4.8" | 50.0" | 24.6 | 0.0 |
| May | 53°F (11°C) | 33°F (1°C) | 43°F (6°C) | 3.5" | 15.9" | 14.0 | 0.0 |
| June | 64°F (18°C) | 42°F (6°C) | 53°F (12°C) | 2.0" | 4.4" | 3.7 | 0.0 |
| July | 73°F (23°C) | 50°F (10°C) | 62°F (16°C) | 1.5" | 0.0" | 0.1 | 0.0 |
| August | 71°F (22°C) | 49°F (10°C) | 60°F (16°C) | 2.1" | 0.0" | 0.1 | 0.0 |
| September | 62°F (17°C) | 41°F (5°C) | 52°F (11°C) | 2.6" | 2.6" | 4.4 | 0.0 |
| October | 50°F (10°C) | 31°F (-1°C) | 40°F (5°C) | 3.5" | 24.4" | 17.4 | 0.0 |
| November | 37°F (3°C) | 21°F (-6°C) | 29°F (-2°C) | 4.2" | 53.9" | 26.7 | 0.0 |
| December | 30°F (-1°C) | 15°F (-10°C) | 22°F (-5°C) | 5.1" | 79.8" | 30.8 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 6.4"
Snow: 74.7"
14.1 days with precipitation
February 5.4"
Snow: 81.2"
13.9 days with precipitation
March 6.2"
Snow: 71.4"
13.0 days with precipitation
April 4.8"
Snow: 50.0"
11.9 days with precipitation
May 3.5"
Snow: 15.9"
10.7 days with precipitation
June 2.0"
Snow: 4.4"
6.2 days with precipitation
July 1.5"
6.9 days with precipitation
August 2.1"
8.6 days with precipitation
September 2.6"
Snow: 2.6"
8.5 days with precipitation
October 3.5"
Snow: 24.4"
9.6 days with precipitation
November 4.2"
Snow: 53.9"
11.2 days with precipitation
December 5.1"
Snow: 79.8"
14.7 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 18
50% probability date
Last Spring Freeze
June 11
50% probability date
Growing Season
99 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,440
Higher = more heating needed
Cooling Degree Days
28
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Alta's climate means for you
Alta runs 39°F a year - peaking in July, coldest in December.
- Gardeners get about 99 frost-free days, with the last spring freeze near June 11 - plan the planting calendar around it, not the regional average.
- Energy bills track 9,440 heating and 28 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: Alta, UT
In Alta, Utah, the NOAA 1991–2020 climate normals put the annual average temperature at 39°F, ranging from a mean daily high of 48°F to a mean daily low of 30°F. July is typically the warmest month of the year, while December is the coldest. As thirty-year averages computed from station USC00420072, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Alta receives roughly 47.1 inches of precipitation each year, with 458.3 inches typically falling as snow. The frost-free season averages 99 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near June 11 and the first fall freeze near September 18. For energy use, 9,440 heating degree days and 28 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Alta scores 44/100 (Moderate), 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 July-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 Alta, UT? ▼
The average annual temperature in Alta, Utah is 39°F. The warmest month averages 73°F (23°C) and the coldest averages 15°F (-10°C).
How much rain does Alta get? ▼
Alta receives 47.1 inches of precipitation annually, including 458.3 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Alta? ▼
Alta has a climate comfort score of 44/100 (Moderate), milder than 8% of U.S. cities in the PlainClimate database.
When is the growing season in Alta? ▼
Alta has approximately 99 frost-free days per year, with the last spring freeze around June 11 and the first fall freeze around September 18.
How much energy does heating and cooling require in Alta? ▼
Alta has 9,440 heating degree days and 28 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 Alta climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00420072 near Alta.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00420072. 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.