Climate Comfort Score
78/100
Good
NOAA 1991–2020 normals 56°F annual avg Public-domain federal data
Alton - Melvin Price L&d, IL Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 56°F
- Avg annual temp
- 78/100
- Comfort score
- 41.9"
- Annual precip
- 215d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Alton - Melvin Price L&d
Alton - Melvin Price L&d, Illinois averages 56°F a year and scores 78/100 on the comfort index - good, milder than 74% of U.S. cities.
- 56°F
- annual average temperature (NOAA normal)
- 78/100
- comfort score, milder than 74% of U.S. cities
- 41.9"
- annual precipitation
- 215 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
56°F (13°C)
Avg High
65°F
Avg Low
46°F
Annual Precip
41.9"
Comfort Score
78/100
Good
Avg Annual Temperature
56°F
30-year mean (NOAA NCEI)
Annual Precipitation
41.9"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Alton - Melvin Price L&d) 78.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Alton - Melvin Price L&d area.
How Alton - Melvin Price L&d compares to every U.S. city
Alton - Melvin Price L&d's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
78 Top 26% higher than 74% 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 Alton - Melvin Price L&d
MethodologyAlton - Melvin Price L&d'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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 39°F (4°C) | 22°F (-6°C) | 30°F (-1°C) | 2.5" | 24.4 | 0.0 |
| February | 44°F (7°C) | 25°F (-4°C) | 35°F (1°C) | 2.5" | 20.0 | 0.0 |
| March | 54°F (12°C) | 35°F (2°C) | 44°F (7°C) | 3.5" | 11.1 | 0.0 |
| April | 66°F (19°C) | 45°F (7°C) | 56°F (13°C) | 4.9" | 1.5 | 0.0 |
| May | 75°F (24°C) | 56°F (13°C) | 66°F (19°C) | 5.5" | 0.0 | 0.4 |
| June | 84°F (29°C) | 66°F (19°C) | 75°F (24°C) | 3.4" | 0.0 | 5.7 |
| July | 87°F (31°C) | 69°F (21°C) | 78°F (26°C) | 4.0" | 0.0 | 11.4 |
| August | 86°F (30°C) | 67°F (20°C) | 77°F (25°C) | 3.3" | 0.0 | 8.4 |
| September | 80°F (27°C) | 60°F (15°C) | 70°F (21°C) | 3.4" | 0.0 | 3.3 |
| October | 68°F (20°C) | 48°F (9°C) | 58°F (14°C) | 2.9" | 0.1 | 0.2 |
| November | 54°F (12°C) | 37°F (3°C) | 45°F (7°C) | 3.4" | 8.1 | 0.0 |
| December | 44°F (6°C) | 27°F (-3°C) | 35°F (2°C) | 2.6" | 20.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 2.5"
7.2 days with precipitation
February 2.5"
7.8 days with precipitation
March 3.5"
9.9 days with precipitation
April 4.9"
10.3 days with precipitation
May 5.5"
11.3 days with precipitation
June 3.4"
8.2 days with precipitation
July 4.0"
7.3 days with precipitation
August 3.3"
7.0 days with precipitation
September 3.4"
6.8 days with precipitation
October 2.9"
7.6 days with precipitation
November 3.4"
8.2 days with precipitation
December 2.6"
7.7 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 5
50% probability date
Last Spring Freeze
April 4
50% probability date
Growing Season
215 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,780
Higher = more heating needed
Cooling Degree Days
1,424
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Alton - Melvin Price L&d's climate means for you
Alton - Melvin Price L&d runs 56°F a year - peaking in July, coldest in January.
- Gardeners get about 215 frost-free days, with the last spring freeze near April 4 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,780 heating and 1,424 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: Alton - Melvin Price L&d, IL
Based on station USC00110137 feeding NOAA's 1991–2020 climate normals, Alton - Melvin Price L&d, Illinois averages 56°F a year, ranging from a mean daily high of 65°F to a mean daily low of 46°F. July is typically the warmest month of the year, while January 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.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Alton - Melvin Price L&d receives roughly 41.9 inches of precipitation each year, predominantly as rainfall. The frost-free season averages 215 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 4 and the first fall freeze near November 5. For energy use, 4,780 heating degree days and 1,424 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Alton - Melvin Price L&d scores 78/100 (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 Alton - Melvin Price L&d, IL? ▼
The average annual temperature in Alton - Melvin Price L&d, Illinois is 56°F. The warmest month averages 87°F (31°C) and the coldest averages 22°F (-6°C).
How much rain does Alton - Melvin Price L&d get? ▼
Alton - Melvin Price L&d receives 41.9 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Alton - Melvin Price L&d? ▼
Alton - Melvin Price L&d has a climate comfort score of 78/100 (Good), milder than 74% of U.S. cities in the PlainClimate database.
When is the growing season in Alton - Melvin Price L&d? ▼
Alton - Melvin Price L&d has approximately 215 frost-free days per year, with the last spring freeze around April 4 and the first fall freeze around November 5.
How much energy does heating and cooling require in Alton - Melvin Price L&d? ▼
Alton - Melvin Price L&d has 4,780 heating degree days and 1,424 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 Alton - Melvin Price L&d climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00110137 near Alton - Melvin Price L&d.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00110137. 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.