The best times to visit Grundy Center for ideal weather are

May 7th to July 22nd

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Grundy Center Travel Info

Weather in Grundy Center


Average temperatures in Grundy Center vary an incredible amount. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 32nd percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Grundy Center, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 85.8°F (29.9°C) with temperatures rarely dropping below 63.7°F (17.6°C) at night.

Grundy Center Temperatures (Fahrenheit)


Grundy Center Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Grundy Center Perceived Temperature (F)


Grundy Center Perceived Temperature (C)



Average Grundy Center Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 28.1 18.2 9.6
Feb 29.1 19.5 11.1
Mar 47.8 36.4 27.6
Apr 61.7 48.6 37.7
May 73.8 61.3 50.1
Jun 81.9 70.4 59.9
Jul 84.4 73.3 62.7
Aug 82.6 71.1 60.7
Sep 76.9 63.5 51.8
Oct 63.8 51.2 40.3
Nov 48.9 37.6 28.3
Dec 32.7 24 15.9

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -2.2 -7.7 -12.4
Feb -1.6 -6.9 -11.6
Mar 8.8 2.4 -2.4
Apr 16.5 9.2 3.2
May 23.2 16.3 10.1
Jun 27.7 21.3 15.5
Jul 29.1 22.9 17.1
Aug 28.1 21.7 15.9
Sep 24.9 17.5 11
Oct 17.7 10.7 4.6
Nov 9.4 3.1 -2.1
Dec 0.4 -4.4 -8.9



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Grundy Center are January, February, and then December. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid January. For example, on the week of January 8th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late May with an average of 3 days of significant precipitation the week of May 21st.

When can you find snow in Grundy Center? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Grundy Center.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Grundy Center (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 4% 0 0.3
Feb 6% 0 0.8
Mar 14% 0 1.5
Apr 25% 0 5.4
May 27% 0 5.9
Jun 29% 0 5.4
Jul 17% 0 4
Aug 20% 0 4.2
Sep 18% 0 3.3
Oct 16% 0 2.7
Nov 11% 0 1.5
Dec 10% 0 1.5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 4 0 0.8
Feb 6 0 2
Mar 14 0 3.8
Apr 25 0 13.7
May 27 0 15
Jun 29 0 13.7
Jul 17 0 10.2
Aug 20 0 10.7
Sep 18 0 8.4
Oct 16 0 6.9
Nov 11 0 3.8
Dec 10 0 3.8


Humidity and Wind

Grundy Center has some very humid months, with other comfortably humid months. The least humid month is April (55.9% relative humidity), and the most humid month is December (73.2%).

Wind in Grundy Center is usually moderate. The windiest month is April, followed by January and May. April’s average wind speed of around 11.2 knots (12.9 MPH or 20.8 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid April where average top sustained speeds reach 19.6 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Grundy Center.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 10.3 Gentle breeze 17.7 Strong breeze
Feb 10.1 Gentle breeze 16.8 Significant breeze
Mar 10 Gentle breeze 17 Strong breeze
Apr 11.2 Significant breeze 19.1 Strong breeze
May 10.2 Gentle breeze 18.3 Strong breeze
Jun 8 Gentle breeze 16.3 Significant breeze
Jul 6.2 Light breeze 12.9 Strong breeze
Aug 5.8 Light breeze 11.7 Significant breeze
Sep 6.9 Light breeze 13.4 Strong breeze
Oct 8.5 Gentle breeze 15.4 Significant breeze
Nov 10 Gentle breeze 17 Strong breeze
Dec 9.6 Gentle breeze 16.5 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 67.7%
Feb 67.9%
Mar 64.2%
Apr 55.9%
May 55.9%
Jun 63.9%
Jul 67.8%
Aug 70.6%
Sep 63.6%
Oct 59%
Nov 62.6%
Dec 73.2%


Is it Safe to Travel to Grundy Center?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Grundy Center, IA, US is April, followed by June and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Grundy Center in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 54.2 in November means 54.2% of the tourists vs. April.



Overall Grundy Center Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 78.2°F (25.7°C) and 31.1°F (-0.5°C) with far warmer temperatures in the later months. Rain is somewhat common with 4 to 8 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 5 to 9 days of precipitation per month. June – August is the second busiest season for tourism in Grundy Center, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 79.6°F (26.4°C) and 40°F (4.4°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 3 to 5 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Grundy Center to be enjoyable for warm weather travelers. The average high during this season is between 33.5°F (0.8°C) and 26.8°F (-2.9°C). On average, it rains or snows a smalll amount: 1 to 3 times per month. These times of year are fairly slow with tourists.


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