March weather forecastJohnston, IA
March
Weather in March
With the arrival of March, spring begins to set up residence in Johnston. Warmth begins to seep into the air and the snow starts to disappear, leaving only 0.94" (24mm) on the ground. This shift in weather is welcomed by both nature and Johnston's residents, who start to engage more actively in outdoor activities. The city feels alive and in flux, transitioning steadily from the cool whiteness of winter towards the colorful blossoming of spring. March paints a serene picture of the city shaking off its wintry slumber.Temperature
As Johnston transitions into March, a marked increase in the average high-temperature is observed, rising from a subzero cold 31.5°F (-0.3°C) in February to a chilly 46.9°F (8.3°C). The average nighttime temperature lowers to a subzero cold 31.8°F (-0.1°C) throughout March.Humidity
In Johnston, the average relative humidity in March is 75%.Rainfall
In Johnston, during March, the rain falls for 9.3 days and regularly aggregates up to 0.94" (24mm) of precipitation. In Johnston, during the entire year, the rain falls for 114.6 days and collects up to 15.51" (394mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Johnston, during March, snow falls for 4.4 days and regularly aggregates up to 0.94" (24mm) of snow. Throughout the year, there are 29.6 snowfall days, and 6.77" (172mm) of snow is accumulated.Daylight
The average length of the day in March is 11h and 58min.On the first day of March, sunrise is at 6:48 am and sunset at 6:05 pm CST. On the last day of the month, sunrise is at 6:57 am and sunset at 7:39 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 March, the average sunshine is 6.2h.UV index
The average daily maximum UV index in March in Johnston, Iowa, is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In March, the maximum UV index of 3 suggests this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in March
Johnston, IA
- Average high temperature in March: 46.9°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in March: 31.8°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in March
Johnston, IA
- Average pressure in March: 30.07"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in March
Johnston, IA
- Average wind speed in March: 10.3mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in March
Johnston, IA
- Average humidity in March: 75%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in March
Johnston, IA
- Average rainfall in March: 0.94"
The wettest months (with the highest rainfall) are May and June (2.52").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in March
Johnston, IA
- Average rainfall days in March: 9.3 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in March
Johnston, IA
- Average snowfall in March: 0.94"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in March
Johnston, IA
- Average snowfall days in March: 4.4 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in March /
Average sunshine in March
Johnston, 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 12min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in March
Johnston, IA
- Average sunshine days in March: 17.6 days
The month with the most sunshine days is December (22.8 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in March
Johnston, 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
Johnston, IA
- Average cloud cover in March: 49
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in March
Johnston, IA
- Average visibility in March: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
