As of Oct 4, 2026, the latest day this station has reported
How much rain has Sully County, South Dakota, had in 2026?
13.22 inches of rain have fallen so far in 2026 at the weather station 4 miles northwest of Onida, Sully County, through Oct 4. That is 4.86 inches less than a usual year to date (73% of usual).
- Rain so far
- 13.22 in
- Usual by Oct 4
- 18.08 in
- Percent of usual
- 73%
- 2025 by Oct 4
- 19.12 in
This is Sully County’s 2026 so far, drawn as a Rain Print. Put your name and dates on it: framed $89, print $45.Get Sully 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.
Want another year, like the drought or the year you married? Rainfall art of any town and year.
Month by month
| Month | Rain, in | Usual, in | Vs usual |
|---|---|---|---|
| Jan 4 days not reported | 0.14 | 0.48 | −0.34 |
| Feb 1 day not reported | 0.02 | 0.76 | −0.74 |
| Mar | 0.54 | 0.97 | −0.43 |
| Apr | 1.70 | 1.96 | −0.26 |
| May | 1.68 | 3.17 | −1.49 |
| Jun | 2.04 | 3.63 | −1.59 |
| Jul | 1.27 | 2.52 | −1.25 |
| Aug | 2.31 | 2.51 | −0.20 |
| Sep | 3.50 | 1.78 | +1.72 |
| Oct to the 4th | 0.02 | 0.30 | −0.28 |
| So far | 13.22 | 18.08 | −4.86 |
2026 so far in Sully County
- Wettest month: September, 3.50 inches.
- Biggest single day: 1.30 inches on Aug 13.
- Longest dry stretch: 17 days in a row with the gauge at zero, Feb 1 to Feb 17.
- 2025 by the same date: 19.12 inches at the same station (it missed 1 day). On the 271 days both years reported, 2026 had 5.90 inches less than 2025.
The station, and what usual means
The numbers come from NOAA’s daily record for the station 4 miles northwest of Onida (station ID 396292), 1 mile from the middle of Sully County. It reported 272 of the 277 days from Jan 1 to Oct 4; the 5 days with no report count as unknown, not as dry. 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 272 days the station reported, so a missing day counts on neither side.
Why this station: 2 stations inside Sully 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 Sully County, South Dakota, had in 2026?
13.22 inches of rain have fallen so far in 2026 at the weather station 4 miles northwest of Onida, Sully County, through Oct 4. That is 4.86 inches less than a usual year to date (73% of usual).
Is Sully County wetter or drier than usual in 2026?
Drier so far. The weather station 4 miles northwest of Onida had 13.22 inches from Jan 1 to Oct 4, 73% of the usual 18.08 inches for the same days.
What was the wettest month in Sully County in 2026?
September, with 3.50 inches at the weather station 4 miles northwest of Onida, counting Jan 1 through Oct 4.
What was the biggest rain in Sully County in 2026?
1.30 inches on Aug 13, 2026, the most the gauge caught in one day this year through Oct 4.
How does 2026 compare with 2025 in Sully County?
From Jan 1 to Oct 4, the weather station 4 miles northwest of Onida had 19.12 inches in 2025 (2025 missed 1 day) and 13.22 inches in 2026 (2026 missed 5 days). On the 271 days both years reported, 2026 had 5.90 inches less than 2025.
Next door
- Hughes County 17.65 in, 98% to Oct 13
- Hyde County 11.97 in, 62% to Oct 13
- Stanley County 17.50 in, 96% to Oct 13
Rain in South Dakota, county by county · PRF insurance in Sully County · Farmland Atlas: Sully County