September
September · August · June
77climate match
United States · 1991–2020
Best time to visit
Valley-Hi.
September leads for comfortable weather in Valley-Hi: typically 24.2°C by day, 10.2°C at night, with 99 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.2°C
Typical low10.2°C
Rain in September99 mm
July
July · August · June
66climate match
September
September · May · October
70climate match
The weakest month is January, scoring 5 against September’s 77 — days reach only 2.9°C, 21° 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
52.9° / -7.2°
Feb
54.6° / -6.5°
Mar
79.3° / -2.8°
Apr
3516.3° / 2.2°
May
6121.6° / 7.7°
Jun
7226.1° / 12.7°
Jul
7128.6° / 15.2°
Aug
7527.8° / 14.3°
Sep
7724.2° / 10.2°
Oct
4917.7° / 3.9°
Nov
2011.1° / -1.1°
Dec
55.1° / -4.6°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 2.9°C | -7.2°C | 65 mm | 8.3 | 9 h 37 | 5 | Strong coverage |
| February | 4.6°C | -6.5°C | 56 mm | 7.5 | 10 h 37 | 5 | Strong coverage |
| March | 9.3°C | -2.8°C | 83 mm | 8.8 | 11 h 49 | 7 | Strong coverage |
| April | 16.3°C | 2.2°C | 103 mm | 11 | 13 h 12 | 35 | Strong coverage |
| May | 21.6°C | 7.7°C | 105 mm | 11.9 | 14 h 22 | 61 | Strong coverage |
| June | 26.1°C | 12.7°C | 107 mm | 10.6 | 15 h | 72 | Strong coverage |
| July | 28.6°C | 15.2°C | 92 mm | 9 | 14 h 45 | 71 | Strong coverage |
| August | 27.8°C | 14.3°C | 84 mm | 8.2 | 13 h 45 | 75 | Strong coverage |
| September | 24.2°C | 10.2°C | 99 mm | 7.8 | 12 h 24 | 77 | Strong coverage |
| October | 17.7°C | 3.9°C | 80 mm | 7.7 | 11 h 04 | 49 | Strong coverage |
| November | 11.1°C | -1.1°C | 68 mm | 6.6 | 9 h 54 | 20 | Strong coverage |
| December | 5.1°C | -4.6°C | 78 mm | 8.2 | 9 h 20 | 5 | Strong coverage |
What has changed
Valley-Hi runs +0.4°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
+0.6
Feb
+1.0
Mar
+0.3
Apr
+0.5
May
+0.1
Jun
-0.3
Jul
+0.4
Aug
-0.3
Sep
+0.4
Oct
-0.1
Nov
0.0
Dec
+2.1
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 25.0°C25 Jan 1950 | -32.8°C20 Jan 1994 | 53 mm21 Jan 1902 | 153 mm1999 · driest 2 mm in 1981 | 98 |
| February | 26.7°C22 Feb 2018 | -28.9°C10 Feb 1899 | 53 mm24 Feb 1962 | 135 mm1962 · driest 0 mm in 1922 | 99 |
| March | 33.3°C24 Mar 1907 | -19.4°C17 Mar 1900 | 59 mm1 Mar 1954 | 165 mm1993 · driest 4 mm in 1923 | 97 |
| April | 35.6°C26 Apr 1921 | -11.7°C2 Apr 1911 | 84 mm21 Apr 1964 | 221 mm1964 · driest 11 mm in 1968 | 97 |
| May | 36.7°C23 May 1964 | -6.1°C2 May 1908 | 56 mm27 May 1913 | 200 mm1960 · driest 17 mm in 1911 | 94 |
| June | 38.9°C30 Jun 1959 | -3.9°C11 Jun 1980 | 135 mm27 Jun 1995 | 282 mm1995 · driest 4 mm in 1965 | 99 |
| July | 42.2°C2 Jul 1966 | 2.8°C30 Jul 1981 | 109 mm20 Jul 1977 | 251 mm1989 · driest 3 mm in 1983 | 99 |
| August | 38.9°C6 Aug 1918 | -0.6°C29 Aug 1982 | 92 mm20 Aug 1990 | 263 mm1901 · driest 6 mm in 1951 | 101 |
| September | 40.0°C3 Sep 1953 | -3.9°C30 Sep 1915 | 121 mm18 Sep 2004 | 309 mm2004 · driest 1 mm in 1943 | 98 |
| October | 33.3°C5 Oct 1951 | -8.9°C31 Oct 1988 | 100 mm15 Oct 1954 | 281 mm1976 · driest 1 mm in 1963 | 95 |
| November | 28.9°C3 Nov 1971 | -17.2°C15 Nov 1908 | 94 mm27 Nov 1993 | 150 mm1952 · driest 9 mm in 1998 | 93 |
| December | 25.0°C6 Dec 2001 | -24.4°C22 Dec 1960 | 75 mm14 Dec 1901 | 158 mm2008 · driest 3 mm in 1955 | 95 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | 2 | 4 |
| February | <1 | 0 | 25 | 2 | 4 |
| March | <1 | 0 | 23 | 3 | 2 |
| April | 3 | <1 | 11 | 4 | <1 |
| May | 10 | 2 | 2 | 4 | 0 |
| June | 20 | 6 | 0 | 4 | 0 |
| July | 27 | 12 | 0 | 3 | 0 |
| August | 26 | 9 | 0 | 3 | 0 |
| September | 14 | 4 | <1 | 3 | 0 |
| October | 4 | <1 | 8 | 3 | <1 |
| November | <1 | 0 | 19 | 2 | <1 |
| December | 0 | 0 | 26 | 3 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 24% | 7% | 24% | -0.7–6.4°C |
| February | <1% | 24% | 7% | 24% | 0.6–7.3°C |
| March | 8% | 27% | 9% | 30% | 6.0–13.3°C |
| April | 24% | 31% | 11% | 37% | 13.4–19.3°C |
| May | 49% | 34% | 11% | 42% | 19.6–25.2°C |
| June | 66% | 31% | 12% | 38% | 24.4–28.2°C |
| July | 72% | 28% | 11% | 31% | 26.9–30.7°C |
| August | 74% | 25% | 9% | 24% | 26.1–30.1°C |
| September | 66% | 24% | 9% | 25% | 22.5–26.7°C |
| October | 33% | 22% | 8% | 23% | 15.6–20.3°C |
| November | 7% | 23% | 8% | 20% | 8.2–13.6°C |
| December | <1% | 24% | 8% | 26% | 1.4–8.2°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 5217059
- NOAA station
- USC00362721 · EVERETT
- Station distance
- 14.4 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 40.03°, 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.