Climate Comfort Score
59/100
Moderate
NOAA 1991–2020 normals 50°F annual avg Public-domain federal data
Leon, IA Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 50°F
- Avg annual temp
- 59/100
- Comfort score
- 39.3"
- Annual precip
- 161d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Leon
Leon, Iowa averages 50°F a year and scores 59/100 on the comfort index - moderate, milder than 39% of U.S. cities.
- 50°F
- yearly average temperature, NOAA normal
- 59/100
- comfort score, milder than 39% of U.S. cities
- 39.3"
- annual precipitation · 29" snow
- 161 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
50°F (10°C)
Avg High
61°F
Avg Low
38°F
Annual Precip
39.3"
Annual Snow
28.5"
Comfort Score
59/100
Moderate
Avg Annual Temperature
50°F
30-year mean (NOAA NCEI)
Annual Precipitation
39.3"
Plus 28.5" of snow
Comfort score vs national 100-point ceiling (Leon) 59.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Leon area.
How Leon compares to every U.S. city
Leon's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
59 Top 61% higher than 39% 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 Leon
MethodologyLeon'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 | 33°F (0°C) | 13°F (-11°C) | 23°F (-5°C) | 0.9" | 8.0" | 30.1 | 0.0 |
| February | 38°F (3°C) | 16°F (-9°C) | 27°F (-3°C) | 1.5" | 6.0" | 25.7 | 0.0 |
| March | 50°F (10°C) | 27°F (-3°C) | 39°F (4°C) | 2.3" | 4.9" | 22.5 | 0.0 |
| April | 63°F (17°C) | 37°F (3°C) | 50°F (10°C) | 3.8" | 0.1" | 11.2 | 0.0 |
| May | 72°F (22°C) | 48°F (9°C) | 60°F (16°C) | 5.5" | 0.0" | 1.4 | 0.2 |
| June | 81°F (27°C) | 59°F (15°C) | 70°F (21°C) | 5.6" | 0.0" | 0.0 | 1.6 |
| July | 86°F (30°C) | 63°F (17°C) | 74°F (23°C) | 4.4" | 0.0" | 0.0 | 7.8 |
| August | 84°F (29°C) | 61°F (16°C) | 72°F (22°C) | 4.5" | 0.0" | 0.0 | 5.8 |
| September | 76°F (24°C) | 50°F (10°C) | 63°F (17°C) | 4.2" | 0.0" | 0.9 | 1.2 |
| October | 64°F (18°C) | 39°F (4°C) | 52°F (11°C) | 3.2" | 0.2" | 9.5 | 0.1 |
| November | 50°F (10°C) | 28°F (-2°C) | 39°F (4°C) | 2.1" | 1.5" | 20.5 | 0.0 |
| December | 38°F (3°C) | 18°F (-8°C) | 28°F (-2°C) | 1.4" | 7.8" | 28.6 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.9"
Snow: 8.0"
6.0 days with precipitation
February 1.5"
Snow: 6.0"
7.1 days with precipitation
March 2.3"
Snow: 4.9"
9.0 days with precipitation
April 3.8"
Snow: 0.1"
11.5 days with precipitation
May 5.5"
14.3 days with precipitation
June 5.6"
12.9 days with precipitation
July 4.4"
10.6 days with precipitation
August 4.5"
9.9 days with precipitation
September 4.2"
8.3 days with precipitation
October 3.2"
Snow: 0.2"
9.0 days with precipitation
November 2.1"
Snow: 1.5"
7.4 days with precipitation
December 1.4"
Snow: 7.8"
6.7 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 8
50% probability date
Last Spring Freeze
April 30
50% probability date
Growing Season
161 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,406
Higher = more heating needed
Cooling Degree Days
823
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Leon's climate means for you
Leon runs 50°F a year - peaking in July, coldest in January.
- Gardeners get about 161 frost-free days, with the last spring freeze near April 30 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,406 heating and 823 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: Leon, IA
The NOAA 1991–2020 climate normals describe Leon, Iowa as a location with an annual average temperature of 50°F, ranging from a mean daily high of 61°F to a mean daily low of 38°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00134758, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Anyone planning to live, garden, or travel in Leon should weigh precipitation alongside temperature: the annual average runs 39.3 inches, with 28.5 inches typically falling as snow. The frost-free season averages 161 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 30 and the first fall freeze near October 8. And on the energy front, 6,406 heating degree days and 823 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Leon scores 59/100 (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 Leon, IA? ▼
The average annual temperature in Leon, Iowa is 50°F. The warmest month averages 86°F (30°C) and the coldest averages 13°F (-11°C).
How much rain does Leon get? ▼
Leon receives 39.3 inches of precipitation annually, including 28.5 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Leon? ▼
Leon has a climate comfort score of 59/100 (Moderate), milder than 39% of U.S. cities in the PlainClimate database.
When is the growing season in Leon? ▼
Leon has approximately 161 frost-free days per year, with the last spring freeze around April 30 and the first fall freeze around October 8.
How much energy does heating and cooling require in Leon? ▼
Leon has 6,406 heating degree days and 823 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 Leon climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00134758 near Leon.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00134758. 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.