Climate Comfort Score
59/100
Moderate
NOAA 1991–2020 normals 47°F annual avg Public-domain federal data
Grundy Ctr, IA Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 47°F
- Avg annual temp
- 59/100
- Comfort score
- 36.8"
- Annual precip
- 163d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Grundy Ctr
Grundy Ctr, Iowa averages 47°F a year and scores 59/100 on the comfort index - moderate, milder than 39% of U.S. cities.
- 47°F
- average temperature, NOAA 1991-2020 normal
- 59/100
- comfort score, milder than 39% of U.S. cities
- 36.8"
- annual precipitation · 32" snow
- 163 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
47°F (8°C)
Avg High
57°F
Avg Low
37°F
Annual Precip
36.8"
Annual Snow
32.3"
Comfort Score
59/100
Moderate
Avg Annual Temperature
47°F
30-year mean (NOAA NCEI)
Annual Precipitation
36.8"
Plus 32.3" of snow
Comfort score vs national 100-point ceiling (Grundy Ctr) 59.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Grundy Ctr area.
How Grundy Ctr compares to every U.S. city
Grundy Ctr'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 Grundy Ctr
MethodologyGrundy Ctr'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 | 26°F (-3°C) | 9°F (-13°C) | 17°F (-8°C) | 0.8" | 9.2" | 30.7 | 0.0 |
| February | 31°F (-1°C) | 13°F (-11°C) | 22°F (-6°C) | 1.0" | 5.9" | 26.7 | 0.0 |
| March | 44°F (7°C) | 24°F (-4°C) | 34°F (1°C) | 1.9" | 3.9" | 24.3 | 0.0 |
| April | 59°F (15°C) | 36°F (2°C) | 47°F (8°C) | 3.9" | 1.4" | 10.7 | 0.0 |
| May | 70°F (21°C) | 48°F (9°C) | 59°F (15°C) | 4.9" | 0.0" | 1.0 | 0.6 |
| June | 80°F (27°C) | 60°F (15°C) | 70°F (21°C) | 5.7" | 0.0" | 0.0 | 2.6 |
| July | 83°F (28°C) | 62°F (17°C) | 73°F (23°C) | 4.4" | 0.0" | 0.0 | 4.3 |
| August | 81°F (27°C) | 60°F (15°C) | 70°F (21°C) | 4.8" | 0.0" | 0.0 | 2.5 |
| September | 75°F (24°C) | 51°F (10°C) | 63°F (17°C) | 3.3" | 0.0" | 0.4 | 1.3 |
| October | 62°F (17°C) | 38°F (4°C) | 50°F (10°C) | 2.9" | 0.3" | 9.2 | 0.1 |
| November | 45°F (7°C) | 26°F (-3°C) | 36°F (2°C) | 1.9" | 2.1" | 22.0 | 0.0 |
| December | 32°F (0°C) | 15°F (-9°C) | 24°F (-5°C) | 1.4" | 9.5" | 29.5 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.8"
Snow: 9.2"
5.5 days with precipitation
February 1.0"
Snow: 5.9"
5.8 days with precipitation
March 1.9"
Snow: 3.9"
6.8 days with precipitation
April 3.9"
Snow: 1.4"
10.3 days with precipitation
May 4.9"
11.6 days with precipitation
June 5.7"
11.2 days with precipitation
July 4.4"
8.6 days with precipitation
August 4.8"
8.9 days with precipitation
September 3.3"
8.0 days with precipitation
October 2.9"
Snow: 0.3"
7.9 days with precipitation
November 1.9"
Snow: 2.1"
6.5 days with precipitation
December 1.4"
Snow: 9.5"
6.5 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 9
50% probability date
Last Spring Freeze
April 29
50% probability date
Growing Season
163 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,227
Higher = more heating needed
Cooling Degree Days
730
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Grundy Ctr's climate means for you
Grundy Ctr runs 47°F a year - peaking in July, coldest in January.
- Gardeners get about 163 frost-free days, with the last spring freeze near April 29 - plan the planting calendar around it, not the regional average.
- Energy bills track 7,227 heating and 730 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: Grundy Ctr, IA
Based on station USC00133487 feeding NOAA's 1991–2020 climate normals, Grundy Ctr, Iowa averages 47°F a year, ranging from a mean daily high of 57°F to a mean daily low of 37°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.
Anyone planning to live, garden, or travel in Grundy Ctr should weigh precipitation alongside temperature: the annual average runs 36.8 inches, with 32.3 inches typically falling as snow. The frost-free season averages 163 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 29 and the first fall freeze near October 9. And on the energy front, 7,227 heating degree days and 730 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Grundy Ctr scores 59/100 (Moderate), 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 Grundy Ctr, IA? ▼
The average annual temperature in Grundy Ctr, Iowa is 47°F. The warmest month averages 83°F (28°C) and the coldest averages 9°F (-13°C).
How much rain does Grundy Ctr get? ▼
Grundy Ctr receives 36.8 inches of precipitation annually, including 32.3 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Grundy Ctr? ▼
Grundy Ctr 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 Grundy Ctr? ▼
Grundy Ctr has approximately 163 frost-free days per year, with the last spring freeze around April 29 and the first fall freeze around October 9.
How much energy does heating and cooling require in Grundy Ctr? ▼
Grundy Ctr has 7,227 heating degree days and 730 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 Grundy Ctr climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00133487 near Grundy Ctr.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00133487. 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.