Romeoville weather in March: Romeoville, Illinois: normal highs, lows, rain and records for March
Romeoville in March has a normal high of 49°F and a normal low of 30°F, a daily mean of 39°F, rising from 42°F on the 1st to 55°F by the 31st. Measurable precipitation falls on 11 days in a normal March, 2.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 9°C and low of −1°C, 69 mm of precipitation and 11 cm of snow in March.
- NOAA stationRomeoville Weather Office
- Station IDUSC00117457
- Location41.60°N 88.08°W
- Elevation660 ft (201 m)
- From the center2 miles
- Population41,177
- Jan 32° 16°
- Feb 36° 20°
- Mar 49° 30°
- Apr 61° 40°
- May 72° 50°
- Jun 82° 60°
- Jul 85° 65°
- Aug 83° 63°
- Sep 76° 55°
- Oct 64° 44°
- Nov 49° 32°
- Dec 37° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Romeoville in March?
The normal high is 49°F and the normal low 30°F, for a daily mean of 39.1°F. March is 11.1°F warmer than February and 11.2°F cooler than April. March is the 9th warmest month of the year in Romeoville and the 8th wettest. Across the month the normal high rises 13°F, from 42°F on March 1 to 55°F on March 31. From one year to the next March's mean temperature typically moves about 4.6°F either way (NOAA's standard deviation), so roughly two Marchs in three average between 35°F and 44°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 38%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 42°F | 25°F | 35% | 17% |
| March 8 | 45°F | 27°F | 35% | 18% |
| March 15 | 48°F | 30°F | 36% | 19% |
| March 22 | 51°F | 32°F | 37% | 21% |
| March 31 | 55°F | 35°F | 38% | 22% |
Every day of March: normal high, low and chance of precipitation (warmest afternoon March 31, coldest night March 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| March 1 | 42°F | 25°F | 35% | 17% | 11 h 10 min |
| March 2 | 42°F | 25°F | 35% | 17% | 11 h 20 min |
| March 3 | 43°F | 25°F | 35% | 17% | 11 h 20 min |
| March 4 | 43°F | 26°F | 35% | 17% | 11 h 20 min |
| March 5 | 44°F | 26°F | 35% | 17% | 11 h 20 min |
| March 6 | 44°F | 26°F | 35% | 18% | 11 h 30 min |
| March 7 | 45°F | 27°F | 35% | 18% | 11 h 30 min |
| March 8 | 45°F | 27°F | 35% | 18% | 11 h 30 min |
| March 9 | 46°F | 27°F | 35% | 18% | 11 h 30 min |
| March 10 | 46°F | 28°F | 36% | 18% | 11 h 40 min |
| March 11 | 46°F | 28°F | 36% | 18% | 11 h 40 min |
| March 12 | 47°F | 29°F | 36% | 19% | 11 h 40 min |
| March 13 | 47°F | 29°F | 36% | 19% | 11 h 50 min |
| March 14 | 48°F | 29°F | 36% | 19% | 11 h 50 min |
| March 15 | 48°F | 30°F | 36% | 19% | 11 h 50 min |
| March 16 | 49°F | 30°F | 36% | 19% | 11 h 50 min |
| March 17 | 49°F | 30°F | 36% | 20% | 12 h |
| March 18 | 50°F | 30°F | 36% | 20% | 12 h |
| March 19 | 50°F | 31°F | 36% | 20% | 12 h |
| March 20 | 50°F | 31°F | 36% | 20% | 12 h 10 min |
| March 21 | 51°F | 31°F | 36% | 20% | 12 h 10 min |
| March 22 | 51°F | 32°F | 37% | 21% | 12 h 10 min |
| March 23 | 52°F | 32°F | 37% | 21% | 12 h 10 min |
| March 24 | 52°F | 32°F | 37% | 21% | 12 h 20 min |
| March 25 | 52°F | 33°F | 37% | 21% | 12 h 20 min |
| March 26 | 53°F | 33°F | 37% | 22% | 12 h 20 min |
| March 27 | 53°F | 33°F | 37% | 22% | 12 h 30 min |
| March 28 | 54°F | 34°F | 37% | 22% | 12 h 30 min |
| March 29 | 54°F | 34°F | 37% | 22% | 12 h 30 min |
| March 30 | 55°F | 34°F | 38% | 22% | 12 h 30 min |
| March 31 | 55°F | 35°F | 38% | 22% | 12 h 40 min |
- Normal high
- 49°FMarch average
- Normal low
- 30°FMarch average
- Precipitation
- 2.71 inmonth total
- Days with precipitation
- 110.01 inch or more
- Snowfall
- 4.2 inmonth total
- Nights at 32°F or colder
- 20
- Daylight
- 11 h 10 min to 12 h 40 minMarch 1 to March 31
- Days at 70°F or more
- 2
- Days at 80°F or more
- 1
- Sunshine
- 67%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00117457; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Romeoville in March?
On a given March day the chance of 0.01 inch or more is 36% on average, highest around March 31 (38%). In all, 2.71 in falls on 11 days of a normal March, 1 of them with an inch or more.
In a normal March in Romeoville, 20 nights fall to freezing, 3 days stay below freezing all day and snowfall averages 4.2 inches.
Snow falls on 3 days in a normal March, and an inch or more covers the ground on 3 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00117457.
What are the records for March in Romeoville?
The warmest March temperature on this station's record (since 1992) is 85°F, on March 21, 2012; the coldest is −13°F, on March 4, 2002. The wettest March brought 6.54 in (2009); the snowiest, 12.1 inches (2002).
The March mean against the 1991-2020 normal of 39.1°F: 2021 43.8°F (+4.7), 2022 39.9°F (+0.8), 2023 38.0°F (−1.1), 2024 44.0°F (+4.9), 2025 44.1°F (+5.0), 2026 44.2°F (+5.1). 5 of 6 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 43.8°F | +4.7°F | 1.32 in |
| 2022 | 39.9°F | +0.8°F | 4.69 in |
| 2023 | 38.0°F | −1.1°F | 3.02 in |
| 2024 | 44.0°F | +4.9°F | 5.88 in |
| 2025 | 44.1°F | +5.0°F | 3.92 in |
| 2026 | 44.2°F | +5.1°F | 5.04 in |
Source: records: ACIS, station USC00117457; recent months: ACIS, station USC00117457. Records and recent months use complete months only.
How does March in Romeoville compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, March normal highs run from 44°F in Antioch to 61°F in Anna; Romeoville's is 49°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.