How Much Fell
Method and accuracyMethod

How much rain and snow fell in Helena, Montana?

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Helena got 0.77 in of rain in the last 24 hours (to 9 AM MDT, Oct 11). Past 7 days: 0.78 in. This year: 12.86 in (132 percent of normal).

Yesterday and last night (24 hours to 6 AM MDT, Oct 10): no rain.

4.8
inches
of new snow

In the 24 hours to 6:00 AM MDT, Sunday, October 11, 2026

NOAA snow estimate

0.77 in melted to water radar estimate

  • NOAA snow estimate
  • Melted to water, estimated from weather radar

Compared with normal

  • Last 7 days0.57 in wetter than normal (normal 0.21 in, Oct 5 to 11, Helena Airport, 1991 to 2020)1991 to 2020 average (the official normal), NOAA station records, Helena Airport
  • This month0.66 in wetter than normal (normal 0.32 in, Oct 1 to 11, Helena Airport, 1991 to 2020)1991 to 2020 average, NOAA station records, Helena Airport
  • This year3.13 in wetter than normal (normal 9.73 in, Jan 1 to Oct 11, Helena Airport, 1991 to 2020)1991 to 2020 average, NOAA station records, Helena Airport

Will this match my gauge? Each day here ends at 6:00 AM MDT, close to when volunteers read their rain gauges? (about 7 AM). How close we usually are

Helena 4.8Helena 4.8
New snow, inches
0.1
1
2
4
6
8
12
18
24+
Snow in the 24 hours to 6 AM Sunday, Oct 11. NOAA snowfall analysis.
Labels: Helena and nearby towns within 40 miles, in inches. Cut from the state map.

The 115th biggest snow day in Helena since 1939, and the most since January 5, 2025.

NOAA station records · Helena Airport (USW00024144), 1.6 mi away · 114 bigger days out of 27,944 on record, 4 tied days. This storm: Oct 11 to Oct 11, 4.8 in of new snow; its biggest day, Oct 11, was 4.8 in.

The most rain in a day in Helena since May 8, 2024, and the 77th wettest day at Helena Airport since 1938, tied with 5 other days.

NOAA station records · Helena Airport (USW00024144), 1.6 mi away · 76 wetter days out of 31,318 on record, 5 tied days. This storm: Oct 11 to Oct 11, 0.86 in of rain; its biggest day, Oct 11, was 0.86 in.

The last 14 days

Sep 27 to Oct 10, 2026

New snow, inches (NOAA snow estimate)

  1. n/m
  2. n/m
  3. n/m
  4. n/m
  5. n/m
  6. n/m
  7. n/m
  8. n/m
  9. n/m
  10. n/m
  11. n/m
  12. n/m
  13. n/m
  14. n/m
  1. 0.00
  2. 0.00
  3. 0.00
  4. 0.00
  5. 0.00
  6. 0.00
  7. 0.00
  8. 0.00
  9. 0.00
  10. 0.00
  11. 0.00
  12. 0.00
  13. 0.00
  14. 0.00

Melted to water, inches (radar estimate)

Each bar is one day ending 6:00 AM MDT. T = a trace, too little to measure; n/m = not measured.? Every value is printed, so the chart reads without color.

October 2026, day by day

Tap a day to see its total
Sun
Mon
Tue
Wed
Thu
Fri
Sat

Tap a day for its total.

Figures: rain, inches (radar estimate); new snow, inches (NOAA snow estimate). Striped days are not measured or not in the data; days marked not yet are after the latest day. Each day ends 6:00 AM MDT.

Total for a date range

Loading the total.

Rain goes back to Oct 14, 2020; snow to Oct 1, 2008. Days labeled by the date they end.

Every rain total for Helena

PeriodRain
Last 24 hours, to 6:00 AM MDT Oct 110.77 in radar estimate
Last 72 hours0.78 in radar estimate
Last 7 days0.78 in radar estimate
This month so far0.98 in radar estimate
This year, 2026 so far12.86 in radar estimate

Every snow total

PeriodNew snow
Last 24 hours4.8 in NOAA snow estimate
Last 72 hours4.8 in NOAA snow estimate
Last 7 daysnot measured
This month so farnot measured
This season so farnot measured

How months count

Helena at a glance

Helena is in Montana, at about 4,004 ft above sea level at its Census center point and had an estimated 34,729 residents in 2024.

The weather station's records since 1938 come from Helena Airport, 1.6 miles away.

The wettest day on record at Helena Airport was 2.06 in on May 3, 1964; the biggest snow day was 18.8 in on November 11, 1959.

From Sep 27 to Oct 10, Helena had no measurable rain on any of the 14 days with data, by weather radar.

Nearby rain gauges (read by volunteers)

2 closest
Rain gaugeDistanceRead atMelted to waterNew snowSnow depth
Helena 3.5 SSE
Station MT-JF-4. Read at 7:35 AM on October 11, 2026.
3.6 mi7:35 AMnot reported5.0 innot reported
Helena 10.6 N
Station MT-LC-4. Read at 6:00 AM on October 11, 2026.
10.3 mi6:00 AM0.32 in4.6 in4.5 in

Volunteer gauge reports: CoCoRaHS (cocorahs.org), CC BY 3.0. Measured by hand once a day; report date October 11, 2026. Shown as measured, not edited.

How close? Radar rain estimates are usually within about 10 to 15 percent of a rain gauge in your yard. City snow totals are usually within about 25 percent or 1 inch of what volunteers measure. Method and accuracy