Joliet, IL weather in April
Joliet is cool in April, with frequent rain: highs average 60°F and nights drop to about 39°F. Expect about 12 wet days.
- Normal high
- 60°F
- Normal low
- 39°F
- Wet days
- 12
- 3.9 in total
- Muggy days
- 0
- dew point 65°F+
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 54°F | 66°F |
| Normal low | 34°F | 44°F |
| Chance of a wet day | 38% | 42% |
| Sunrise / sunset | 6:35 am / 7:17 pm | 5:50 am / 7:48 pm |
| Daylight | 12.7 h | 14.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical April day
- 6 am45°Fdew point 36°F
- 9 am51°Fdew point 37°F
- Noon55°Fdew point 37°F
- 3 pm56°Fdew point 37°F
- 6 pm53°Fdew point 36°F
- 9 pm50°Fdew point 36°F
NOAA hourly normals (local standard time) from Chicago Midway Airport (25 mi away); average wind 11 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F10 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow12 of 30
- Notable rainat least 0.10 in7 of 30
- Freezing nightslow 32°F or below6 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain and snow in April
Normal precipitation is 3.9 in; a dry April brings about 2.4 in and a wet one about 4.8 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more. Normal snowfall is 0.1 in.
How April varies from year to year
- Warmest April, 1991-20202010: average high 68°F
- Coolest April2018: average high 51°F
- Wettest April2007: 6.1 in
- Driest April1997: 1.6 in
- Highest reading89°F (April 19, 2002)
- Lowest reading18°F (April 8, 2018)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
April compared with March and May
| March | April | May | |
|---|---|---|---|
| Normal high | 47°F | 60°F | 71°F |
| Normal low | 29°F | 39°F | 49°F |
| Wet days | 10 | 12 | 12 |
| Comfortable days | 3 | 10 | 15 |
| Daylight | 12.0 h | 13.3 h | 14.5 h |
Highs change by +13°F from March and +11°F into May.
Nearby alternatives in April
- Warmer: Springfield, IL144 mi · high 66°F · 12 wet days
- Cooler: Milwaukee, WI105 mi · high 55°F · 12 wet days
How Joliet ranks in April
- Normal high272nd warmest of 378 cities; 4th of 8 in Illinois
- Wet days325th driest of 378
- Comfortable days198th most of 340
What to pack for Joliet in April
- A warm jacket – lows near 39°F, highs near 60°F
- A rain jacket or umbrella – rain on about 12 days
Frost in April
The last spring frost typically comes around Apr 19; in 1 year in 10 it comes after May 7. All frost dates for Joliet.
Heating and cooling
April has 473 heating degree days and 5 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How cold is Joliet in April?
The normal high is 60°F and the normal low is 39°F. From 1991 to 2020 the coldest April reading was 18°F (most recently on April 8, 2018).
Does it rain a lot in Joliet in April?
About 12 days in April have at least 0.01 in of precipitation, and the normal total is 3.9 in. The wettest April in 1991-2020 was in 2007 (6.1 in); the driest was in 1997 (1.6 in).
Does it snow in Joliet in April?
Yes. Normal snowfall in April is 0.1 in.
Is April a good time to visit Joliet?
April ranks 4th of 12 months on our comfort score for Joliet (62 out of 100). It has about 10 comfortable days. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Joliet Brandon Rd Dam (USC00114530), 1.9 mi SW of the city center, 543 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Chicago Midway Airport (USW00014819), 25 mi NE of the city center, 612 ft (71 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Chicago Midway Intl Arpt (725340-14819), 25 mi NE of the city center, 610 ft (69 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).