June
June · September · July
80climate match
United States · 1991–2020
Best time to visit
Mount Vernon.
June leads for comfortable weather in Mount Vernon: typically 24.8°C by day, 7.1°C at night, with 34 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortJune
Typical high24.8°C
Typical low7.1°C
Rain in June34 mm
July
July · August · September
62climate match
May
May · June · October
80climate match
The weakest month is January, scoring 5 against June’s 80 — days reach only 5.8°C, 18° 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
55.8° / -4.8°
Feb
128.3° / -4°
Mar
2612° / -2°
Apr
3915.2° / 0°
May
6020.2° / 4°
Jun
8024.8° / 7.1°
Jul
6731.3° / 9.8°
Aug
6631° / 8.9°
Sep
7526.1° / 4.9°
Oct
5117.9° / 0.6°
Nov
189.8° / -2.5°
Dec
55.1° / -5.2°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 5.8°C | -4.8°C | 26 mm | 7.1 | 9 h 11 | 5 | Strong coverage |
| February | 8.3°C | -4°C | 17 mm | 5.2 | 10 h 22 | 12 | Strong coverage |
| March | 12°C | -2°C | 29 mm | 7 | 11 h 46 | 26 | Strong coverage |
| April | 15.2°C | 0°C | 38 mm | 8.4 | 13 h 24 | 39 | Strong coverage |
| May | 20.2°C | 4°C | 49 mm | 9.1 | 14 h 46 | 60 | Strong coverage |
| June | 24.8°C | 7.1°C | 34 mm | 6.6 | 15 h 31 | 80 | Strong coverage |
| July | 31.3°C | 9.8°C | 11 mm | 2.6 | 15 h 13 | 67 | Strong coverage |
| August | 31°C | 8.9°C | 12 mm | 1.9 | 14 h 02 | 66 | Strong coverage |
| September | 26.1°C | 4.9°C | 13 mm | 3.1 | 12 h 28 | 75 | Strong coverage |
| October | 17.9°C | 0.6°C | 27 mm | 6.1 | 10 h 54 | 51 | Strong coverage |
| November | 9.8°C | -2.5°C | 31 mm | 6.9 | 9 h 32 | 18 | Strong coverage |
| December | 5.1°C | -5.2°C | 28 mm | 7.1 | 8 h 51 | 5 | Strong coverage |
What has changed
Mount Vernon runs -0.7°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
+0.4
Feb
-2.0
Mar
-0.7
Apr
-0.7
May
-0.7
Jun
-1.1
Jul
+0.1
Aug
-0.2
Sep
0.0
Oct
-1.8
Nov
-0.8
Dec
-0.9
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C1 Jan 1904 | -31.1°C27 Jan 1957 | 26 mm18 Jan 1971 | 71 mm1965 · driest 3 mm in 1961 | 75 |
| February | 22.8°C21 Feb 1995 | -28.9°C4 Feb 1985 | 16 mm5 Feb 2020 | 61 mm1986 · driest 2 mm in 2002 | 72 |
| March | 26.7°C30 Mar 1966 | -20.6°C14 Mar 1906 | 25 mm4 Mar 1983 | 72 mm1957 · driest 5 mm in 2021 | 72 |
| April | 32.8°C28 Apr 1987 | -10.6°C19 Apr 1966 | 38 mm3 Apr 1999 | 81 mm1978 · driest 6 mm in 1980 | 72 |
| May | 36.7°C31 May 1986 | -10.6°C2 May 1954 | 47 mm29 May 1906 | 109 mm1991 · driest 3 mm in 1992 | 72 |
| June | 39.4°C18 Jun 1974 | -3.9°C27 Jun 1966 | 26 mm18 Jun 1964 | 96 mm1964 · driest 1 mm in 2021 | 73 |
| July | 43.3°C12 Jul 2002 | 1.7°C3 Jul 1971 | 34 mm22 Jul 1987 | 52 mm1993 · driest 0 mm in 2022 | 72 |
| August | 44.4°C5 Aug 1961 | -1.1°C24 Aug 1992 | 57 mm16 Aug 1993 | 108 mm1965 · driest 0 mm in 1955 | 74 |
| September | 43.3°C4 Sep 1904 | -6.1°C25 Sep 1970 | 27 mm15 Sep 1959 | 83 mm1959 · driest 0 mm in 2012 | 74 |
| October | 35.0°C8 Oct 1980 | -15.6°C31 Oct 2002 | 24 mm8 Oct 2010 | 85 mm1957 · driest 0 mm in 1988 | 71 |
| November | 26.1°C15 Nov 1999 | -22.8°C13 Nov 1955 | 23 mm28 Nov 1995 | 97 mm1968 · driest 5 mm in 2019 | 74 |
| December | 18.9°C31 Dec 1980 | -30.6°C23 Dec 1983 | 27 mm23 Dec 1971 | 102 mm1983 · driest 3 mm in 2019 | 76 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | <1 | 3 |
| February | 0 | 0 | 23 | <1 | 2 |
| March | <1 | 0 | 23 | <1 | 1 |
| April | 2 | <1 | 16 | <1 | <1 |
| May | 7 | 2 | 5 | 1 | 0 |
| June | 16 | 6 | <1 | <1 | 0 |
| July | 28 | 21 | 0 | <1 | 0 |
| August | 28 | 20 | 0 | <1 | 0 |
| September | 19 | 9 | 3 | <1 | 0 |
| October | 5 | <1 | 14 | <1 | <1 |
| November | 0 | 0 | 22 | <1 | 1 |
| December | 0 | 0 | 27 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 23% | 1% | 25% | 2.2–7.8°C |
| February | 1% | 20% | <1% | 21% | 4.9–11.4°C |
| March | 7% | 23% | 1% | 24% | 9.3–14.6°C |
| April | 22% | 25% | 2% | 30% | 12.7–18.4°C |
| May | 45% | 26% | 4% | 32% | 17.6–23.1°C |
| June | 71% | 21% | 3% | 19% | 22.5–28.1°C |
| July | 91% | 8% | <1% | 4% | 28.5–33.8°C |
| August | 90% | 8% | 2% | 6% | 28.3–33.2°C |
| September | 77% | 11% | 1% | 10% | 22.4–28.7°C |
| October | 40% | 17% | 2% | 17% | 15.9–21.8°C |
| November | 4% | 24% | 2% | 29% | 7.6–12.8°C |
| December | 0% | 25% | 2% | 27% | 2.8–8.3°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 5741722
- NOAA station
- USC00354291 · JOHN DAY
- Station distance
- 12.3 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 44.42°, 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.