As of Oct 13, 2026, the latest day this station has reported

How much rain has LaSalle County, Illinois, had in 2026?

40.53 inches of rain have fallen so far in 2026 at the weather station 4 miles southwest of Ottawa, LaSalle County, through Oct 13. That is 10.68 inches more than a usual year to date (136% of usual).

Rain so far
40.53 in
Usual by Oct 13
29.85 in
Percent of usual
136%
2025 by Oct 13
22.70 in
Running total of rain in LaSalle County, 2026, against a usual year01020304050JFMAMJJASOND2026Usual
Inches of rain added up day by day from Jan 1, solid line, against the usual year at this station (dashed), counted on the same days. Days with no report add nothing to either line.

Get LaSalle County’s 2026 rain and snow drawn as a Rain Print, with your name and dates: framed $89, print $45. Make yours

Prints of 2026 ship in January, once the full year is in.

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Month by month

Rain by month in LaSalle County, Illinois, 2026
MonthRain, inUsual, inVs usual
Jan1.371.78−0.41
Feb0.161.54−1.38
Mar3.622.29+1.33
Apr7.083.53+3.55
May2.094.48−2.39
Jun9.864.40+5.46
Jul3.613.63−0.02
Aug7.743.72+4.02
Sep2.813.23−0.42
Oct to the 13th2.191.25+0.94
So far40.5329.85+10.68

2026 so far in LaSalle County

The station, and what usual means

The numbers come from NOAA’s daily record for the station 4 miles southwest of Ottawa (station ID 116526), 2 miles from the middle of LaSalle County. It reported every one of the 286 days from Jan 1 to Oct 13. Rain here means everything the gauge caught: rain, and snow melted down to water. A trace counts as zero. It is read once a day, usually in the morning, and each reading is filed under the day it was read, so an evening storm can show up on the next day.

Usual means NOAA’s 1991 to 2020 daily normals for this station, added up over the same 286 days the station reported, so a missing day counts on neither side.

Why this station: 9 stations inside LaSalle County reported at least 90% of the days in 2026. Mountain snow sites, and stations far above the rest in the county, come last, since their rain is not what the farms below get. Then the pick goes to one with NOAA normals, then the most days reported, then the one nearest the middle of the county. Your own rain gauge can read differently a few miles away.

Questions

How much rain has LaSalle County, Illinois, had in 2026?

40.53 inches of rain have fallen so far in 2026 at the weather station 4 miles southwest of Ottawa, LaSalle County, through Oct 13. That is 10.68 inches more than a usual year to date (136% of usual).

Is LaSalle County wetter or drier than usual in 2026?

Wetter so far. The weather station 4 miles southwest of Ottawa had 40.53 inches from Jan 1 to Oct 13, 136% of the usual 29.85 inches for the same days.

What was the wettest month in LaSalle County in 2026?

June, with 9.86 inches at the weather station 4 miles southwest of Ottawa, counting Jan 1 through Oct 13.

What was the biggest rain in LaSalle County in 2026?

2.10 inches on Jun 11, 2026, the most the gauge caught in one day this year through Oct 13.

How does 2026 compare with 2025 in LaSalle County?

From Jan 1 to Oct 13, the weather station 4 miles southwest of Ottawa had 22.70 inches in 2025 and 40.53 inches in 2026. 2026 had 17.83 inches more than 2025.

Next door

Rain in Illinois, county by county · PRF insurance in LaSalle County · Farmland Atlas: LaSalle County