September
September · August · June
84climate match
United States · 1991–2020
Best time to visit
Tri-Lakes.
September leads for comfortable weather in Tri-Lakes: typically 24°C by day, 11.2°C at night, with 76 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24°C
Typical low11.2°C
Rain in September76 mm
July
July · August · June
68climate match
September
September · May · October
74climate match
The weakest month is January, scoring 5 against September’s 84 — days reach only -0.2°C, 24° below the 24°C the score treats as ideal.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
5-0.2° / -9.1°
Feb
51.9° / -7.7°
Mar
88.3° / -2.6°
Apr
3515.2° / 2.9°
May
6421.4° / 9.4°
Jun
7426.3° / 14.8°
Jul
7128° / 16.4°
Aug
7527.1° / 15.5°
Sep
8424° / 11.2°
Oct
4917° / 5.1°
Nov
129.2° / -0.7°
Dec
52.9° / -5.3°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -0.2°C | -9.1°C | 64 mm | 8.8 | 9 h 30 | 5 | Strong coverage |
| February | 1.9°C | -7.7°C | 47 mm | 6.8 | 10 h 33 | 5 | Strong coverage |
| March | 8.3°C | -2.6°C | 65 mm | 7.9 | 11 h 48 | 8 | Strong coverage |
| April | 15.2°C | 2.9°C | 93 mm | 9.6 | 13 h 15 | 35 | Strong coverage |
| May | 21.4°C | 9.4°C | 110 mm | 10.3 | 14 h 28 | 64 | Strong coverage |
| June | 26.3°C | 14.8°C | 120 mm | 9.5 | 15 h 08 | 74 | Strong coverage |
| July | 28°C | 16.4°C | 97 mm | 8 | 14 h 52 | 71 | Strong coverage |
| August | 27.1°C | 15.5°C | 103 mm | 7.9 | 13 h 49 | 75 | Strong coverage |
| September | 24°C | 11.2°C | 76 mm | 7 | 12 h 25 | 84 | Strong coverage |
| October | 17°C | 5.1°C | 72 mm | 8.4 | 11 h 02 | 49 | Strong coverage |
| November | 9.2°C | -0.7°C | 76 mm | 8.6 | 9 h 49 | 12 | Strong coverage |
| December | 2.9°C | -5.3°C | 61 mm | 8.4 | 9 h 13 | 5 | Strong coverage |
What has changed
Tri-Lakes runs +0.3°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
+0.5
Feb
+0.8
Mar
+1.0
Apr
-0.1
May
+0.5
Jun
+0.3
Jul
-0.4
Aug
-0.6
Sep
+0.3
Oct
+0.5
Nov
-0.4
Dec
+1.7
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.9°C14 Jan 1995 | -31.1°C20 Jan 1985 | 44 mm28 Jan 1967 | 147 mm2005 · driest 13 mm in 1986 | 62 |
| February | 22.2°C26 Feb 2000 | -27.2°C11 Feb 2014 | 58 mm2 Feb 1983 | 135 mm1990 · driest 0 mm in 1987 | 60 |
| March | 28.9°C22 Mar 2012 | -21.1°C9 Mar 1984 | 79 mm31 Mar 2026 | 193 mm2009 · driest 14 mm in 1981 | 61 |
| April | 31.1°C27 Apr 1986 | -13.9°C7 Apr 1982 | 85 mm19 Apr 2013 | 200 mm2013 · driest 8 mm in 2004 | 63 |
| May | 34.4°C28 May 2012 | -4.4°C10 May 2020 | 81 mm16 May 1968 | 206 mm2004 · driest 21 mm in 1988 | 62 |
| June | 39.4°C26 Jun 1988 | 1.7°C7 Jun 2024 | 127 mm1 Jun 2013 | 295 mm1986 · driest 24 mm in 2012 | 62 |
| July | 38.3°C31 Jul 1999 | 3.9°C24 Jul 2014 | 91 mm5 Jul 2022 | 223 mm2003 · driest 7 mm in 1974 | 60 |
| August | 36.7°C20 Aug 1983 | 2.2°C29 Aug 1965 | 109 mm17 Aug 2009 | 233 mm2018 · driest 11 mm in 1969 | 62 |
| September | 35.6°C3 Sep 2011 | -2.8°C23 Sep 1995 | 81 mm29 Sep 1999 | 212 mm1993 · driest 12 mm in 1998 | 63 |
| October | 31.7°C2 Oct 2019 | -8.3°C31 Oct 1988 | 61 mm7 Oct 1998 | 218 mm2001 · driest 4 mm in 1963 | 63 |
| November | 25.0°C7 Nov 1975 | -16.1°C13 Nov 2019 | 111 mm9 Nov 1966 | 215 mm1966 · driest 13 mm in 2012 | 62 |
| December | 21.1°C3 Dec 1982 | -30.0°C22 Dec 1989 | 74 mm8 Dec 1966 | 197 mm1967 · driest 17 mm in 2010 | 61 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | 2 | 5 |
| February | 0 | 0 | 25 | 1 | 4 |
| March | <1 | 0 | 21 | 2 | 2 |
| April | 2 | 0 | 9 | 3 | <1 |
| May | 9 | 2 | <1 | 4 | 0 |
| June | 20 | 6 | 0 | 4 | 0 |
| July | 26 | 9 | 0 | 3 | 0 |
| August | 24 | 6 | 0 | 3 | 0 |
| September | 14 | 3 | <1 | 3 | 0 |
| October | 4 | <1 | 5 | 3 | 0 |
| November | <1 | 0 | 17 | 3 | <1 |
| December | 0 | 0 | 25 | 2 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 27% | 6% | 30% | -4.1–2.9°C |
| February | <1% | 25% | 5% | 23% | -1.9–5.3°C |
| March | 5% | 28% | 8% | 37% | 4.7–11.8°C |
| April | 16% | 33% | 10% | 44% | 12.8–17.5°C |
| May | 44% | 31% | 11% | 39% | 18.7–24.5°C |
| June | 66% | 31% | 12% | 37% | 24.8–28.1°C |
| July | 73% | 27% | 10% | 30% | 26.5–30.2°C |
| August | 74% | 25% | 10% | 26% | 25.6–28.6°C |
| September | 62% | 24% | 8% | 27% | 22.2–25.9°C |
| October | 26% | 26% | 7% | 31% | 14.9–19.6°C |
| November | 5% | 29% | 9% | 35% | 6.0–12.3°C |
| December | 0% | 30% | 7% | 36% | -0.5–5.8°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page
Nearby, measured,
and named.
- Place identity
- GeoNames 4927309
- NOAA station
- USC00121739 · COLUMBIA CITY
- Station distance
- 11.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 27 usable years
- Daylight
- Calculated from latitude 41.25°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.