March weather forecastGrinnell, IA
March
Weather in March
The first month of the spring, March, is a frosty month in Grinnell, Iowa, with an average temperature varying between 45.7°F (7.6°C) and 31.3°F (-0.4°C).Temperature
As February transitions into March, a clear upsurge in temperatures is observed, with average highs advancing from a freezing cold 31.1°F (-0.5°C) to a frosty 45.7°F (7.6°C). In the month of March, the average temperature dips to a subzero cold 31.3°F (-0.4°C) during the night.Humidity
In Grinnell, the average relative humidity in March is 76%.Rainfall
In March, the rain falls for 9.6 days. Throughout March, 0.87" (22mm) of precipitation is accumulated. In Grinnell, Iowa, during the entire year, the rain falls for 117.5 days and collects up to 13.03" (331mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Grinnell, in March, snow falls for 4 days, with typically accumulated 0.67" (17mm) of snow. In Grinnell, during the entire year, snow falls for 30.7 days and aggregates up to 6.06" (154mm) of snow.Daylight
In Grinnell, the average length of the day in March is 11h and 58min.On the first day of March in Grinnell, Iowa, sunrise is at 6:44 am and sunset at 6:01 pm CST. On the last day of the month, sunrise is at 6:53 am and sunset at 7:35 pm CDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from CDT to CST.
Sunshine
In Grinnell, Iowa, the average sunshine in March is 6.3h.UV index
In Grinnell, the average daily maximum UV index in March is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 3 in March leads to these recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in March
Grinnell, IA
- Average high temperature in March: 45.7°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in March: 31.3°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).
Average pressure in March
Grinnell, IA
- Average pressure in March: 30.07"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in March
Grinnell, IA
- Average wind speed in March: 10.5mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in March
Grinnell, IA
- Average humidity in March: 76%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in March
Grinnell, IA
- Average rainfall in March: 0.87"
The wettest months (with the highest rainfall) are May and June (1.97").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in March
Grinnell, IA
- Average rainfall days in March: 9.6 days
The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in March
Grinnell, IA
- Average snowfall in March: 0.67"
The month with the highest snowfall is January (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in March
Grinnell, IA
- Average snowfall days in March: 4 days
The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in March /
Average sunshine in March
Grinnell, IA
- Average daylight in March: 12h and 0min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in March: 6h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in March
Grinnell, IA
- Average sunshine days in March: 17.4 days
The month with the most sunshine days is January (21.1 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in March
Grinnell, IA
- Average UV index in March: 3
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in March
Grinnell, IA
- Average cloud cover in March: 50
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in March
Grinnell, IA
- Average visibility in March: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
