climatesince.com

Boundary County, ID

Tuesday : a low of 29.6°F averaged over Boundary County, ID, the coldest 29 September night in the county average since 1999, 6th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).

Last updated . This page normally updates every day; the latest update is late.

High
58.3°F
Coldest since 2023
36th coldest of 76
Low
29.6°F
Coldest since 1999
6th coldest of 76
Precipitation
0.02 in
Wettest since 2023
22nd wettest of 76
Every 29 September low of the county average in Boundary County, ID since 1951: 29.6°F in 2026; the lowest is 24.2°F, in 1985.
1999: 26.2°F1985: 24.2°F2026: 29.6°F 2026 29.6°F 1985 24.2°F since 1999 1951 2026
  • Normal range, 34.6 to 46.1°F
Every year as a table

Every 29 September high of the county average in Boundary County, ID since 1951: 58.3°F in 2026; the highest is 74.4°F, in 1963.

YearHigh, °FLow, °F
202658.329.6
202570.644.1
202469.939.1
202346.939.3
20227448
202147.640.7
202061.639.1
201935.930
201856.736.4
201768.640.6
201667.946.1
201561.633.9
201461.642.6
20134840.3
201269.943.3
201156.534.7
201069.146.9
200966.535.3
200861.436.8
20075237.7
200669.445.4
200561.335.2
200468.341.9
200371.243
200259.736.9
200158.237.4
20006541.1
199950.626.2
199865.740.5
199754.740.5
199667.743.7
199549.142.8
199471.646.3
199369.642.9
19926235.1
19917146.1
199068.739.4
198968.841.3
198854.232.2
198762.132.8
198642.438.2
198547.624.2
19845525.9
198349.628.5
198245.540.1
198150.337.8
19806045.7
197959.336.5
197854.341.6
197748.144.7
197669.442.3
197562.234.5
197456.132.2
197369.738.1
197245.327.9
197144.535.9
197066.538
196955.346.8
196860.738.9
196773.545.4
196661.148.8
196551.433
196457.337.9
196374.447.5
196249.842.4
196142.938.5
196062.134.1
195945.336.5
195857.337.1
195763.136.3
195642.838.2
195545.841
19544532.8
19534740.1
195268.637.9
195152.842.5

The month

September 2026 so far averaged 51.9°F in Boundary County, ID, the coldest 1 to 29 September in the county average since 2018, tied 33rd coldest of 76 (with 2018, 1989, 1981 and 1 other year) (county average from NOAA gridded data, 1951 to 2026).

The month in words
  • August 2026 averaged 63.3°F in Boundary County, ID, the warmest August in the county average since 2025, 15th warmest of 132 (county average from NOAA's monthly county data, 1895 to 2026).
  • Tuesday 29 September 2026: a high of 58.3°F averaged over Boundary County, ID, the coldest 29 September day in the county average since 2023, 36th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
  • Tuesday 29 September 2026: 0.02 in of precipitation averaged over Boundary County, ID, the wettest 29 September in the county average since 2023, tied 22nd wettest of 76 (with 2022 and 1959) (county average from NOAA gridded data, 1951 to 2026).
Days of the month without a value
0

Nearby

Spokane, WA 88.5 mi, the nearest city with its own station