Climate Comfort Score
68/100
Good
NOAA 1991–2020 normals 51°F annual avg Public-domain federal data
LA Harpe, IL Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 51°F
- Avg annual temp
- 68/100
- Comfort score
- 39.1"
- Annual precip
- 181d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for LA Harpe
LA Harpe, Illinois averages 51°F a year and scores 68/100 on the comfort index - good, milder than 58% of U.S. cities.
- 51°F
- average temperature, NOAA 1991-2020 normal
- 68/100
- comfort score, milder than 58% of U.S. cities
- 39.1"
- annual precipitation
- 181 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
51°F (10°C)
Avg High
61°F
Avg Low
41°F
Annual Precip
39.1"
Comfort Score
68/100
Good
Avg Annual Temperature
51°F
30-year mean (NOAA NCEI)
Annual Precipitation
39.1"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (LA Harpe) 68.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the LA Harpe area.
How LA Harpe compares to every U.S. city
LA Harpe's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 42% higher than 58% 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 LA Harpe
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for LA Harpe 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 | 32°F (0°C) | 15°F (-9°C) | 23°F (-5°C) | 1.6" | 29.4 | 0.0 |
| February | 37°F (3°C) | 19°F (-7°C) | 28°F (-2°C) | 1.8" | 25.4 | 0.0 |
| March | 49°F (10°C) | 29°F (-1°C) | 39°F (4°C) | 2.4" | 21.3 | 0.0 |
| April | 62°F (17°C) | 40°F (4°C) | 51°F (11°C) | 3.9" | 7.1 | 0.0 |
| May | 72°F (22°C) | 52°F (11°C) | 62°F (17°C) | 5.2" | 0.2 | 0.7 |
| June | 81°F (27°C) | 61°F (16°C) | 71°F (22°C) | 4.9" | 0.0 | 5.0 |
| July | 85°F (29°C) | 65°F (18°C) | 75°F (24°C) | 4.2" | 0.0 | 8.7 |
| August | 83°F (28°C) | 63°F (17°C) | 73°F (23°C) | 3.4" | 0.0 | 6.3 |
| September | 77°F (25°C) | 54°F (12°C) | 65°F (19°C) | 3.8" | 0.1 | 3.1 |
| October | 64°F (18°C) | 42°F (6°C) | 53°F (12°C) | 3.1" | 5.8 | 0.3 |
| November | 49°F (10°C) | 31°F (-1°C) | 40°F (4°C) | 2.5" | 17.9 | 0.0 |
| December | 37°F (3°C) | 21°F (-6°C) | 29°F (-2°C) | 2.0" | 27.2 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.6"
5.9 days with precipitation
February 1.8"
6.0 days with precipitation
March 2.4"
6.5 days with precipitation
April 3.9"
9.3 days with precipitation
May 5.2"
10.7 days with precipitation
June 4.9"
9.1 days with precipitation
July 4.2"
8.4 days with precipitation
August 3.4"
7.4 days with precipitation
September 3.8"
6.5 days with precipitation
October 3.1"
7.4 days with precipitation
November 2.5"
6.4 days with precipitation
December 2.0"
6.1 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 19
50% probability date
Last Spring Freeze
April 21
50% probability date
Growing Season
181 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,103
Higher = more heating needed
Cooling Degree Days
955
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What LA Harpe's climate means for you
LA Harpe runs 51°F a year - peaking in July, coldest in January.
- Gardeners get about 181 frost-free days, with the last spring freeze near April 21 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,103 heating and 955 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: LA Harpe, IL
The NOAA 1991–2020 climate normals describe LA Harpe, Illinois as a location with an annual average temperature of 51°F, ranging from a mean daily high of 61°F to a mean daily low of 41°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00114823, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Beyond temperature, LA Harpe averages 39.1 inches of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 181 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 21 and the first fall freeze near October 19. Turning to energy use, 6,103 heating degree days and 955 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, LA Harpe scores 68/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in LA Harpe, IL? ▼
The average annual temperature in LA Harpe, Illinois is 51°F. The warmest month averages 85°F (29°C) and the coldest averages 15°F (-9°C).
How much rain does LA Harpe get? ▼
LA Harpe receives 39.1 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for LA Harpe? ▼
LA Harpe has a climate comfort score of 68/100 (Good), milder than 58% of U.S. cities in the PlainClimate database.
When is the growing season in LA Harpe? ▼
LA Harpe has approximately 181 frost-free days per year, with the last spring freeze around April 21 and the first fall freeze around October 19.
How much energy does heating and cooling require in LA Harpe? ▼
LA Harpe has 6,103 heating degree days and 955 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 LA Harpe climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00114823 near LA Harpe.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00114823. 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.