Climate Romeoville - Illinois

	JanJa	FebFe	MarMa	AprAp	MayMa	JunJu
Average high in ºF Av. high Hi	31	35	48	61	71	80
Average low in ºF Av. low Lo	16	20	29	40	50	60
Av. precipitation in inch Av. precip. Pre.	1.93	1.78	2.77	3.96	4.26	4.34
Av. snowfall in inch Snowfall Sn	11	6	4	1	0	0

	JulJu	AugAu	SepSe	OctOc	NovNo	DecDe
Average high in ºF Av. high Hi	84	82	76	63	49	35
Average low in ºF Av. low Lo	64	63	55	43	33	20
Av. precipitation in inch Av. precip. Pre.	4.71	4.07	3.13	3.41	3.46	2.25
Av. snowfall in inch Snowfall Sn	0	0	0	0	1	9

Romeoville Climate Graph - Illinois Climate Chart

Day	High ºF	Low ºF	Prec/mo inch	Prec/yr inch	Snow/mo inch	Snow/yr inch
1 Jan	31.0	16.4	0.08	0.08	0.31	0.80
2 Jan	30.9	16.3	0.16	0.16	0.71	1.80
3 Jan	30.8	16.2	0.24	0.24	0.98	2.50
4 Jan	30.7	16.1	0.31	0.31	1.42	3.60
5 Jan	30.6	16.0	0.35	0.35	1.69	4.30
6 Jan	30.6	15.9	0.43	0.43	2.09	5.30
7 Jan	30.5	15.9	0.51	0.51	2.40	6.10
8 Jan	30.4	15.8	0.59	0.59	2.80	7.10
9 Jan	30.4	15.8	0.67	0.67	3.19	8.10
10 Jan	30.3	15.7	0.71	0.71	3.50	8.90
11 Jan	30.3	15.7	0.79	0.79	3.90	9.90
12 Jan	30.3	15.6	0.87	0.87	4.21	10.70

Day	High ºF	Low ºF	Precip. inch	Snow inch	Snow d. inch
01 Jun	70.0	55.9	0.02	0.00	0.0
02 Jun	75.9	45.0	0.00	0.00	0.0
03 Jun	84.9	52.0	0.00	0.00	0.0
04 Jun	86.0	57.9	0.00	0.00	0.0
05 Jun	82.0	70.0	0.02	0.00	0.0
06 Jun	90.0	68.0	0.12	0.00	0.0
07 Jun	84.9	64.9	0.48	0.00	0.0
08 Jun	81.0	64.9	1.48	0.00	0.0
09 Jun	89.1	71.1	T	0.00	0.0
10 Jun	-	-	-	-	-
11 Jun	-	-	-	-	-
12 Jun	-	-	-	-	-
13 Jun	-	-	-	-	-
14 Jun	-	-	-	-	-
15 Jun	-	-	-	-	-
16 Jun	-	-	-	-	-
17 Jun	-	-	-	-	-
18 Jun	-	-	-	-	-
19 Jun	-	-	-	-	-
20 Jun	-	-	-	-	-
21 Jun	-	-	-	-	-
22 Jun	-	-	-	-	-
23 Jun	-	-	-	-	-
24 Jun	-	-	-	-	-
25 Jun	-	-	-	-	-
26 Jun	-	-	-	-	-
27 Jun	-	-	-	-	-
28 Jun	-	-	-	-	-
29 Jun	-	-	-	-	-
30 Jun	-	-	-	-	-

	Jun 26	Normal
Average high temperature Av. high temp.	82.6 ºF	31 ºF
Average low temperature Av. low temp.	61.1 ºF	16 ºF
Total precipitation Total precip.	2.12 inch	1.93 inch
Total snowfall Total snowfall	0.00 inch	11 inch

Highest max temperature Highest max temp.	90.0 ºF	-
Lowest max temperature Lowest max temp.	70.0 ºF	-
Highest min temperature Highest min temp.	71.1 ºF	-
Lowest min temperature Lowest min temp.	45.0 ºF	-

Past weather June 2026 incomplete - Missing data

USGS National Map — Open interactive map

Station Data

Monthly averages Romeoville
Longitude: -88.0895, Latitude: 41.6475
Average weather Romeoville, IL - 60446

Monthly: 1991-2020 normals
History: 2008-2026

Abbreviations

Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...