August
August · June · July
90climate match
Ukraine · 1991–2020
Best time to visit
Sumy.
August leads for comfortable weather in Sumy: typically 25.4°C by day, 13.5°C at night, with 39 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortAugust
Typical high25.4°C
Typical low13.5°C
Rain in August39 mm
August
August · July · June
65climate match
May
May · September · August
86climate match
The weakest month is January, scoring 5 against August’s 90 — days reach only -3.3°C, 27° 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
5-3.3° / -8.3°
Feb
5-2.2° / -8°
Mar
53.6° / -3.3°
Apr
4013.5° / 3.5°
May
6920.4° / 9.4°
Jun
8823.9° / 13.3°
Jul
8326° / 14.9°
Aug
9025.4° / 13.5°
Sep
6518.9° / 8.7°
Oct
3011.2° / 3.5°
Nov
53° / -1.9°
Dec
5-1.8° / -6.5°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -3.3°C | -8.3°C | 46 mm | 10.7 | 8 h 23 | 5 | Strong coverage |
| February | -2.2°C | -8°C | 40 mm | 9.4 | 9 h 55 | 5 | Strong coverage |
| March | 3.6°C | -3.3°C | 42 mm | 9.4 | 11 h 42 | 5 | Strong coverage |
| April | 13.5°C | 3.5°C | 37 mm | 7.5 | 13 h 44 | 40 | Strong coverage |
| May | 20.4°C | 9.4°C | 60 mm | 9.1 | 15 h 30 | 69 | Strong coverage |
| June | 23.9°C | 13.3°C | 63 mm | 8.5 | 16 h 30 | 88 | Strong coverage |
| July | 26°C | 14.9°C | 74 mm | 8.7 | 16 h 06 | 83 | Strong coverage |
| August | 25.4°C | 13.5°C | 39 mm | 5.5 | 14 h 33 | 90 | Strong coverage |
| September | 18.9°C | 8.7°C | 56 mm | 7.1 | 12 h 33 | 65 | Strong coverage |
| October | 11.2°C | 3.5°C | 53 mm | 8.2 | 10 h 36 | 30 | Strong coverage |
| November | 3°C | -1.9°C | 41 mm | 8.2 | 8 h 51 | 5 | Strong coverage |
| December | -1.8°C | -6.5°C | 47 mm | 10.1 | 7 h 57 | 5 | Strong coverage |
What has changed
Sumy runs +2.1°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
+2.3
Feb
+2.5
Mar
+3.4
Apr
+2.2
May
+1.0
Jun
+1.7
Jul
+2.5
Aug
+2.7
Sep
+2.2
Oct
+1.8
Nov
+1.2
Dec
+1.6
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 8.8°C2 Jan 2023 | -35.2°C10 Jan 1940 | 28 mm9 Jan 1985 | 109 mm1970 · driest 3 mm in 1972 | 87 |
| February | 11.8°C26 Feb 1990 | -33.9°C10 Feb 1985 | 26 mm24 Feb 2020 | 83 mm1937 · driest 3 mm in 1976 | 87 |
| March | 20.4°C25 Mar 2014 | -32.7°C7 Mar 1964 | 22 mm23 Mar 2013 | 90 mm1998 · driest 0 mm in 1944 | 88 |
| April | 28.6°C11 Apr 2024 | -12.5°C7 Apr 1963 | 50 mm26 Apr 1990 | 108 mm1990 · driest 6 mm in 1948 | 88 |
| May | 33.7°C23 May 1939 | -3.9°C9 May 1952 | 39 mm26 May 1992 | 167 mm2020 · driest 2 mm in 1949 | 88 |
| June | 39.0°C30 Jun 1999 | 2.0°C8 Jun 1958 | 50 mm28 Jun 1980 | 123 mm1945 · driest 5 mm in 1946 | 87 |
| July | 37.1°C18 Jul 2024 | 5.4°C31 Jul 1962 | 100 mm14 Jul 2020 | 240 mm1979 · driest 8 mm in 2001 | 87 |
| August | 39.4°C8 Aug 2010 | 1.5°C31 Aug 1966 | 82 mm10 Aug 1973 | 190 mm1973 · driest 4 mm in 1997 | 87 |
| September | 33.0°C2 Sep 2015 | -4.1°C27 Sep 1939 | 69 mm13 Sep 1978 | 139 mm1978 · driest 2 mm in 2024 | 87 |
| October | 28.0°C4 Oct 1999 | -12.6°C29 Oct 1976 | 48 mm5 Oct 1994 | 168 mm1952 · driest 2 mm in 1987 | 86 |
| November | 17.7°C6 Nov 2013 | -23.7°C23 Nov 1998 | 37 mm9 Nov 1948 | 143 mm1980 · driest 6 mm in 2018 | 85 |
| December | 10.1°C2 Dec 1964 | -30.4°C16 Dec 1997 | 33 mm18 Dec 1975 | 135 mm1981 · driest 4 mm in 1948 | 85 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 28 | <1 |
| February | 0 | 0 | 26 | <1 |
| March | 0 | 0 | 22 | <1 |
| April | <1 | 0 | 6 | <1 |
| May | 7 | <1 | <1 | 2 |
| June | 13 | 3 | 0 | 2 |
| July | 19 | 6 | 0 | 2 |
| August | 17 | 5 | 0 | 1 |
| September | 4 | <1 | <1 | 2 |
| October | <1 | 0 | 7 | 1 |
| November | 0 | 0 | 18 | <1 |
| December | 0 | 0 | 26 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was August (scoring 92); on 2011–2025 it is June (92). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 32% | 2% | 42% | -8.4–-0.7°C |
| February | 0% | 30% | 2% | 39% | -7.2–0.3°C |
| March | <1% | 27% | 2% | 31% | -1.4–7.2°C |
| April | 11% | 26% | 3% | 32% | 9.2–16.2°C |
| May | 44% | 27% | 5% | 34% | 16.8–23.9°C |
| June | 60% | 29% | 6% | 36% | 20.7–26.9°C |
| July | 68% | 28% | 8% | 35% | 22.8–28.8°C |
| August | 70% | 22% | 5% | 23% | 22.4–27.7°C |
| September | 37% | 23% | 5% | 27% | 15.6–22.0°C |
| October | 4% | 25% | 4% | 29% | 8.3–14.0°C |
| November | 0% | 30% | 3% | 39% | 0.1–5.8°C |
| December | 0% | 33% | 3% | 44% | -5.6–1.4°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 692194
- NOAA station
- RSM00034202 · GOTNJA
- Station distance
- 72.6 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 30 usable years
- Daylight
- Calculated from latitude 50.92°, 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.