May
May · June · September
81climate match
United States · 1991–2020
Best time to visit
Simnasho.
May leads for comfortable weather in Simnasho: typically 24.2°C by day, 5.8°C at night, with 26 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high24.2°C
Typical low5.8°C
Rain in May26 mm
June
June · September · July
63climate match
October
October · April · May
84climate match
The weakest month is December, scoring 5 against May’s 81 — days reach only 6.8°C, 17° 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
97.5° / -2.8°
Feb
2210.6° / -2.3°
Mar
4115.2° / -0.5°
Apr
5718.9° / 1.8°
May
8124.2° / 5.8°
Jun
7428.3° / 8.8°
Jul
6034.4° / 11.7°
Aug
6034° / 11.3°
Sep
7029° / 7.5°
Oct
6620.8° / 2.7°
Nov
3011.8° / -0.6°
Dec
56.8° / -3.1°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 7.5°C | -2.8°C | 37 mm | 7.4 | 9 h 08 | 9 | Strong coverage |
| February | 10.6°C | -2.3°C | 26 mm | 5.9 | 10 h 20 | 22 | Strong coverage |
| March | 15.2°C | -0.5°C | 20 mm | 5.4 | 11 h 46 | 41 | Strong coverage |
| April | 18.9°C | 1.8°C | 21 mm | 5.4 | 13 h 25 | 57 | Strong coverage |
| May | 24.2°C | 5.8°C | 26 mm | 4.8 | 14 h 49 | 81 | Strong coverage |
| June | 28.3°C | 8.8°C | 19 mm | 3.7 | 15 h 35 | 74 | Strong coverage |
| July | 34.4°C | 11.7°C | 7 mm | 1.4 | 15 h 17 | 60 | Strong coverage |
| August | 34°C | 11.3°C | 9 mm | 1.3 | 14 h 04 | 60 | Strong coverage |
| September | 29°C | 7.5°C | 8 mm | 1.8 | 12 h 28 | 70 | Strong coverage |
| October | 20.8°C | 2.7°C | 19 mm | 4.1 | 10 h 53 | 66 | Strong coverage |
| November | 11.8°C | -0.6°C | 30 mm | 5.5 | 9 h 29 | 30 | Strong coverage |
| December | 6.8°C | -3.1°C | 41 mm | 8.2 | 8 h 47 | 5 | Strong coverage |
What has changed
Simnasho 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
-0.3
Feb
-2.2
Mar
-1.6
Apr
-1.2
May
-0.8
Jun
-1.0
Jul
+0.5
Aug
+0.5
Sep
-0.1
Oct
-1.0
Nov
0.0
Dec
-0.7
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.7°C30 Jan 1989 | -24.4°C21 Jan 1962 | 24 mm8 Jan 1990 | 110 mm1970 · driest 4 mm in 1985 | 67 |
| February | 25.6°C18 Feb 1965 | -23.9°C5 Feb 1989 | 46 mm16 Feb 2024 | 94 mm2024 · driest 1 mm in 2020 | 67 |
| March | 30.0°C25 Mar 1997 | -12.8°C2 Mar 2019 | 18 mm31 Mar 1999 | 60 mm1983 · driest 2 mm in 1968 | 67 |
| April | 35.0°C27 Apr 1987 | -8.3°C12 Apr 1997 | 31 mm26 Apr 1978 | 57 mm1989 · driest 0 mm in 1966 | 67 |
| May | 42.2°C31 May 1986 | -5.6°C29 May 2001 | 41 mm5 May 2005 | 105 mm1998 · driest 0 mm in 1974 | 68 |
| June | 48.3°C30 Jun 2021 | -5.0°C3 Jun 2001 | 28 mm3 Jun 2010 | 60 mm1969 · driest 0 mm in 1974 | 67 |
| July | 45.6°C21 Jul 1994 | 1.7°C9 Jul 1994 | 23 mm9 Jul 1995 | 43 mm1987 · driest 0 mm in 2024 | 68 |
| August | 47.2°C4 Aug 1998 | 1.1°C30 Aug 2012 | 41 mm10 Aug 2019 | 45 mm2019 · driest 0 mm in 2015 | 67 |
| September | 42.2°C3 Sep 1988 | -3.9°C29 Sep 1983 | 29 mm20 Sep 1982 | 46 mm1982 · driest 0 mm in 1993 | 67 |
| October | 39.4°C9 Oct 1996 | -12.8°C31 Oct 2002 | 31 mm19 Oct 2007 | 55 mm2007 · driest 0 mm in 1958 | 67 |
| November | 27.2°C13 Nov 1999 | -18.9°C25 Nov 1993 | 71 mm19 Nov 1996 | 122 mm1996 · driest 1 mm in 2019 | 68 |
| December | 21.7°C12 Dec 2025 | -26.1°C8 Dec 1972 | 51 mm23 Dec 1964 | 133 mm1964 · driest 1 mm in 1976 | 68 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 24 | <1 |
| February | <1 | 0 | 21 | <1 |
| March | <1 | 0 | 19 | <1 |
| April | 4 | 1 | 11 | <1 |
| May | 13 | 6 | 2 | <1 |
| June | 21 | 12 | <1 | <1 |
| July | 29 | 25 | 0 | <1 |
| August | 29 | 24 | 0 | <1 |
| September | 22 | 14 | <1 | <1 |
| October | 7 | 2 | 8 | <1 |
| November | <1 | 0 | 18 | <1 |
| December | 0 | 0 | 24 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 23% | 3% | 27% | 3.8–10.3°C |
| February | 2% | 21% | 1% | 22% | 8.0–13.7°C |
| March | 16% | 17% | <1% | 15% | 12.6–17.8°C |
| April | 39% | 14% | 1% | 11% | 15.7–22.6°C |
| May | 67% | 14% | 1% | 12% | 21.4–26.8°C |
| June | 86% | 10% | 1% | 7% | 26.4–32.0°C |
| July | 96% | 5% | <1% | 1% | 31.3–36.6°C |
| August | 95% | 5% | 1% | 3% | 31.0–36.4°C |
| September | 89% | 7% | <1% | 3% | 25.2–31.8°C |
| October | 56% | 12% | <1% | 10% | 18.5–23.9°C |
| November | 4% | 21% | 3% | 23% | 8.9–13.4°C |
| December | <1% | 25% | 3% | 28% | 4.7–9.6°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 5752052
- NOAA station
- USC00356532 · PELTON DAM
- Station distance
- 28.8 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 44.97°, 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.