As of 15:25 CDT

Forest Park, IL weather in May

84°

Forest Park, Saturday, 8 August, 15:25

Clear. Feels like 87°. High 85°, low 69°.

Pressure30.00 inHg

Wind3 mph W

Humidity58%

Visibility6.2 mi

Dew point66°

See detailed hourly forecast

In May, Forest Park, IL averages a high of 67.1° and a low of 51.1°. About 4.1 inches of precipitation fall over the month (12 wet days). The record high is 94.3° (2025) and the record low 26.8° (2020). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	61.5°	46°	43%	80.1° (2018)	31.1° (1978)
2	61.3°	45.7°	33%	82.6° (2021)	34.2° (1966)
3	60.1°	45°	35%	81.5° (2012)	32.9° (1967)
4	61.3°	44.8°	35%	78.8° (2024)	34.5° (1966)
5	63.9°	46.9°	38%	80.6° (1980)	34.5° (1967)
6	64°	47.1°	33%	80.8° (2004)	36° (1970)
7	63.7°	47.3°	43%	80.2° (1965)	33.3° (1989)
8	64.6°	48.4°	33%	82.8° (2000)	31.5° (1976)
9	64.6°	49.5°	40%	82.4° (1963)	26.8° (2020)
10	66°	48.6°	28%	85.5° (2022)	28.8° (1966)
11	65.8°	49.5°	47%	82.6° (2011)	34° (2021)
12	64.4°	49.5°	43%	87.3° (2022)	34.9° (2021)
13	65.7°	48.4°	48%	86° (2022)	33.8° (2021)
14	65.8°	49.6°	47%	84° (2007)	36° (2019)
15	66°	50.9°	37%	94.3° (2025)	38.3° (2014)
16	68°	50.9°	43%	85.6° (2025)	37.8° (2014)
17	67.3°	51.3°	32%	86° (1977)	37.8° (2014)
18	68.4°	51.8°	32%	85.8° (1962)	38.1° (2002)
19	68.5°	52.7°	37%	86° (1962)	36.7° (2002)
20	69.4°	52.5°	35%	88° (2012)	39.9° (2002)
21	69.3°	52.9°	32%	86.9° (2024)	32.9° (2002)
22	69.4°	53.6°	32%	86.7° (2021)	39.7° (1997)
23	70°	53.4°	32%	85.1° (1977)	37.4° (1963)
24	69.6°	53.8°	33%	90.3° (2021)	42.6° (2013)
25	69.3°	54.9°	47%	85.5° (2021)	42.4° (1992)
26	70.2°	55°	43%	86.5° (2018)	40.1° (2002)
27	70.9°	54.9°	35%	92.8° (2012)	39.2° (1961)
28	71.1°	55.9°	40%	91.6° (2012)	43° (1992)
29	72.7°	57°	42%	86.7° (1991)	41.9° (1965)
30	73.9°	57.4°	42%	86.9° (1991)	40.3° (2021)
31	73.6°	57.9°	45%	92.3° (2023)	43.7° (1972)