Climate Comfort Score
54/100
Moderate
NOAA 1991–2020 normals 50°F annual avg Public-domain federal data
Jerome, ID Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 50°F
- Avg annual temp
- 54/100
- Comfort score
- 10.4"
- Annual precip
- 165d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Jerome
Jerome, Idaho averages 50°F a year and scores 54/100 on the comfort index - moderate, milder than 27% of U.S. cities.
- 50°F
- yearly average temperature, NOAA normal
- 54/100
- comfort score, milder than 27% of U.S. cities
- 10.4"
- precipitation, annual total
- 165 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
50°F (10°C)
Avg High
62°F
Avg Low
39°F
Annual Precip
10.4"
Comfort Score
54/100
Moderate
Avg Annual Temperature
50°F
30-year mean (NOAA NCEI)
Annual Precipitation
10.4"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Jerome) 54.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Jerome area.
How Jerome compares to every U.S. city
Jerome's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 Top 73% higher than 27% 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 Jerome
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Jerome's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs 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 | 36°F (2°C) | 22°F (-6°C) | 29°F (-2°C) | 1.4" | 29.5 | 0.0 |
| February | 41°F (5°C) | 25°F (-4°C) | 33°F (1°C) | 0.8" | 25.3 | 0.0 |
| March | 52°F (11°C) | 31°F (-1°C) | 41°F (5°C) | 1.1" | 21.9 | 0.0 |
| April | 60°F (15°C) | 36°F (2°C) | 48°F (9°C) | 1.0" | 13.0 | 0.1 |
| May | 70°F (21°C) | 44°F (7°C) | 57°F (14°C) | 1.3" | 2.5 | 1.3 |
| June | 79°F (26°C) | 52°F (11°C) | 66°F (19°C) | 0.6" | 0.2 | 7.0 |
| July | 90°F (32°C) | 59°F (15°C) | 75°F (24°C) | 0.1" | 0.0 | 21.1 |
| August | 89°F (31°C) | 57°F (14°C) | 73°F (23°C) | 0.3" | 0.0 | 19.0 |
| September | 78°F (26°C) | 48°F (9°C) | 63°F (17°C) | 0.4" | 0.5 | 4.6 |
| October | 63°F (17°C) | 38°F (3°C) | 51°F (10°C) | 0.9" | 9.6 | 0.4 |
| November | 47°F (8°C) | 28°F (-2°C) | 38°F (3°C) | 1.0" | 21.8 | 0.0 |
| December | 36°F (2°C) | 22°F (-5°C) | 29°F (-2°C) | 1.5" | 28.3 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.4"
8.9 days with precipitation
February 0.8"
6.2 days with precipitation
March 1.1"
7.1 days with precipitation
April 1.0"
7.2 days with precipitation
May 1.3"
7.1 days with precipitation
June 0.6"
4.6 days with precipitation
July 0.1"
1.7 days with precipitation
August 0.3"
2.1 days with precipitation
September 0.4"
3.4 days with precipitation
October 0.9"
5.1 days with precipitation
November 1.0"
6.9 days with precipitation
December 1.5"
8.3 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 14
50% probability date
Last Spring Freeze
May 2
50% probability date
Growing Season
165 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,177
Higher = more heating needed
Cooling Degree Days
776
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Jerome's climate means for you
Jerome runs 50°F a year - peaking in July, coldest in January.
- Gardeners get about 165 frost-free days, with the last spring freeze near May 2 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,177 heating and 776 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: Jerome, ID
An annual average temperature of 50°F, ranging from a mean daily high of 62°F to a mean daily low of 39°F is what the NOAA 1991–2020 climate normals report for Jerome, Idaho. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00104670 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Jerome averages 10.4 inches of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. The frost-free season averages 165 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 2 and the first fall freeze near October 14. As for energy demand, 6,177 heating degree days and 776 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Jerome scores 54/100 (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 January-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 Jerome, ID? ▼
The average annual temperature in Jerome, Idaho is 50°F. The warmest month averages 90°F (32°C) and the coldest averages 22°F (-6°C).
How much rain does Jerome get? ▼
Jerome receives 10.4 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Jerome? ▼
Jerome has a climate comfort score of 54/100 (Moderate), milder than 27% of U.S. cities in the PlainClimate database.
When is the growing season in Jerome? ▼
Jerome has approximately 165 frost-free days per year, with the last spring freeze around May 2 and the first fall freeze around October 14.
How much energy does heating and cooling require in Jerome? ▼
Jerome has 6,177 heating degree days and 776 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 Jerome climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00104670 near Jerome.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00104670. 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.