June
June · September · July
90climate match
United States · 1991–2020
Best time to visit
Boylston.
June leads for comfortable weather in Boylston: typically 24°C by day, 9.5°C at night, with 14 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortJune
Typical high24°C
Typical low9.5°C
Rain in June14 mm
July
July · August · June
76climate match
May
May · June · September
90climate match
The weakest month is January, scoring 5 against June’s 90 — days reach only 1.8°C, 22° 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
51.8° / -6°
Feb
55.9° / -4.6°
Mar
2611.2° / -1.7°
Apr
4815.7° / 1.6°
May
7220.7° / 6.3°
Jun
9024° / 9.5°
Jul
7929° / 12.4°
Aug
7629.3° / 11.4°
Sep
8324.6° / 6.6°
Oct
4916.4° / 1.4°
Nov
127.6° / -2.7°
Dec
51.7° / -6°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 1.8°C | -6°C | 33 mm | 6.5 | 8 h 54 | 5 | Strong coverage |
| February | 5.9°C | -4.6°C | 21 mm | 4.9 | 10 h 13 | 5 | Strong coverage |
| March | 11.2°C | -1.7°C | 20 mm | 4.9 | 11 h 45 | 26 | Strong coverage |
| April | 15.7°C | 1.6°C | 16 mm | 3.9 | 13 h 31 | 48 | Strong coverage |
| May | 20.7°C | 6.3°C | 20 mm | 4.4 | 15 h 01 | 72 | Strong coverage |
| June | 24°C | 9.5°C | 14 mm | 3.2 | 15 h 51 | 90 | Strong coverage |
| July | 29°C | 12.4°C | 8 mm | 1.5 | 15 h 31 | 79 | Strong coverage |
| August | 29.3°C | 11.4°C | 5 mm | 1.6 | 14 h 13 | 76 | Strong coverage |
| September | 24.6°C | 6.6°C | 9 mm | 1.7 | 12 h 30 | 83 | Strong coverage |
| October | 16.4°C | 1.4°C | 20 mm | 4.3 | 10 h 48 | 49 | Strong coverage |
| November | 7.6°C | -2.7°C | 28 mm | 5.6 | 9 h 17 | 12 | Strong coverage |
| December | 1.7°C | -6°C | 36 mm | 7.1 | 8 h 32 | 5 | Strong coverage |
What has changed
Boylston 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
+0.5
Feb
+0.2
Mar
-0.3
Apr
-0.1
May
+0.5
Jun
-0.3
Jul
+0.7
Aug
+1.5
Sep
+1.0
Oct
-0.1
Nov
+0.8
Dec
+0.8
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 17.8°C31 Jan 1971 | -33.9°C21 Jan 1927 | 38 mm1 Jan 2009 | 112 mm1970 · driest 3 mm in 1985 | 121 |
| February | 18.9°C28 Feb 1901 | -30.6°C1 Feb 1956 | 29 mm2 Feb 1916 | 81 mm1902 · driest 0 mm in 1920 | 122 |
| March | 26.7°C30 Mar 1923 | -20.6°C5 Mar 1955 | 31 mm6 Mar 2016 | 86 mm1971 · driest 1 mm in 1895 | 121 |
| April | 34.4°C25 Apr 1977 | -10.0°C5 Apr 1896 | 24 mm20 Apr 1893 | 55 mm1893 · driest 0 mm in 1931 | 119 |
| May | 37.2°C31 May 1986 | -7.8°C1 May 1954 | 54 mm15 May 2011 | 72 mm2011 · driest 0 mm in 1904 | 117 |
| June | 42.2°C30 Jun 2021 | -1.1°C3 Jun 1918 | 41 mm7 Jun 1936 | 115 mm1905 · driest 0 mm in 1922 | 118 |
| July | 43.3°C26 Jul 1928 | -1.1°C27 Jul 1894 | 25 mm2 Jul 1916 | 42 mm1908 · driest 0 mm in 2018 | 120 |
| August | 40.6°C16 Aug 2023 | -1.7°C25 Aug 1910 | 41 mm21 Aug 1990 | 54 mm1990 · driest 0 mm in 2011 | 115 |
| September | 36.7°C6 Sep 2020 | -8.9°C24 Sep 1926 | 30 mm23 Sep 1984 | 70 mm1911 · driest 0 mm in 2008 | 116 |
| October | 30.6°C1 Oct 1904 | -12.8°C29 Oct 1971 | 39 mm3 Oct 1927 | 65 mm2016 · driest 0 mm in 1895 | 119 |
| November | 21.7°C23 Nov 1933 | -27.2°C23 Nov 1985 | 45 mm22 Nov 1901 | 109 mm1921 · driest 0 mm in 1929 | 119 |
| December | 18.3°C2 Dec 2021 | -35.0°C12 Dec 1919 | 38 mm30 Dec 1937 | 107 mm1996 · driest 2 mm in 1976 | 116 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 | 5 |
| February | 0 | 0 | 24 | <1 | 3 |
| March | 0 | 0 | 22 | <1 | <1 |
| April | 1 | 0 | 11 | <1 | 0 |
| May | 7 | 2 | 2 | <1 | 0 |
| June | 13 | 5 | 0 | <1 | 0 |
| July | 24 | 15 | 0 | <1 | 0 |
| August | 26 | 14 | 0 | 0 | 0 |
| September | 14 | 5 | <1 | <1 | 0 |
| October | 2 | 0 | 12 | <1 | <1 |
| November | 0 | 0 | 22 | <1 | 2 |
| December | 0 | 0 | 29 | <1 | 6 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 22% | 2% | 24% | -2.9–4.4°C |
| February | 0% | 18% | 1% | 18% | 2.4–9.0°C |
| March | 5% | 13% | <1% | 9% | 8.6–14.4°C |
| April | 23% | 10% | <1% | 6% | 13.8–19.2°C |
| May | 51% | 11% | <1% | 7% | 17.9–23.7°C |
| June | 74% | 10% | <1% | 6% | 21.9–27.1°C |
| July | 93% | 4% | <1% | 1% | 26.1–31.6°C |
| August | 93% | 5% | <1% | 2% | 25.9–30.7°C |
| September | 73% | 8% | <1% | 5% | 20.5–26.5°C |
| October | 25% | 11% | <1% | 9% | 14.5–19.1°C |
| November | <1% | 21% | 2% | 22% | 5.3–9.7°C |
| December | 0% | 23% | 3% | 25% | -0.8–5.0°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 5788004
- NOAA station
- USC00452505 · ELLENSBURG
- Station distance
- 24 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 26 usable years
- Daylight
- Calculated from latitude 46.91°, 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.