September
September · May · June
Romania · 1991–2020
September leads for comfortable weather in Costeşti: typically 24.1°C by day, 11.8°C at night, with 58 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · April · September
The weakest month is January, scoring 5 against September’s 88 — days reach only 4.4°C, 20° below the 24°C the score treats as ideal.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 4.4°C | -4°C | 39 mm | 5.8 | 9 h 09 | 5 | Strong coverage |
| February | 7.2°C | -2.4°C | 30 mm | 5.3 | 10 h 21 | 11 | Strong coverage |
| March | 12.4°C | 1.4°C | 40 mm | 6.3 | 11 h 46 | 34 | Strong coverage |
| April | 18.3°C | 6.4°C | 58 mm | 7.7 | 13 h 24 | 58 | Strong coverage |
| May | 23.4°C | 11°C | 82 mm | 10 | 14 h 47 | 78 | Strong coverage |
| June | 27.2°C | 14.7°C | 101 mm | 9.9 | 15 h 33 | 73 | Strong coverage |
| July | 29.4°C | 16.3°C | 84 mm | 7.3 | 15 h 15 | 69 | Strong coverage |
| August | 29.5°C | 16.3°C | 78 mm | 6.8 | 14 h 03 | 70 | Strong coverage |
| September | 24.1°C | 11.8°C | 58 mm | 6.2 | 12 h 28 | 88 | Strong coverage |
| October | 17.8°C | 7.1°C | 59 mm | 6.2 | 10 h 53 | 59 | Strong coverage |
| November | 10.9°C | 2.4°C | 49 mm | 6.2 | 9 h 31 | 29 | Strong coverage |
| December | 5.3°C | -2.2°C | 51 mm | 6.8 | 8 h 50 | 5 | Strong coverage |
What has changed
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.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 19.8°C29 Jan 2002 | -27.0°C25 Jan 1963 | 35 mm3 Jan 2007 | 122 mm2023 · driest 0 mm in 1989 | 66 |
| February | 23.1°C16 Feb 2016 | -22.9°C14 Feb 1985 | 39 mm10 Feb 1984 | 101 mm1986 · driest 2 mm in 2002 | 66 |
| March | 27.3°C31 Mar 2024 | -18.6°C5 Mar 1987 | 37 mm16 Mar 2021 | 138 mm1962 · driest 1 mm in 2012 | 66 |
| April | 31.2°C30 Apr 2013 | -5.2°C7 Apr 2003 | 44 mm19 Apr 2014 | 158 mm2014 · driest 0 mm in 2007 | 66 |
| May | 34.2°C28 May 2008 | 0.7°C3 May 1982 | 122 mm10 May 1973 | 179 mm1961 · driest 7 mm in 1986 | 65 |
| June | 36.6°C26 Jun 2025 | 3.3°C7 Jun 1962 | 98 mm26 Jun 1992 | 235 mm2018 · driest 5 mm in 2000 | 64 |
| July | 40.6°C4 Jul 2000 | 7.1°C5 Jul 1984 | 78 mm16 Jul 1998 | 240 mm2014 · driest 6 mm in 2015 | 65 |
| August | 40.7°C7 Aug 2012 | 3.5°C29 Aug 1981 | 91 mm22 Aug 1999 | 212 mm2005 · driest 0 mm in 2008 | 65 |
| September | 36.0°C2 Sep 2015 | -1.4°C30 Sep 1970 | 53 mm1 Sep 2022 | 190 mm1972 · driest 0 mm in 1961 | 65 |
| October | 32.6°C1 Oct 2012 | -5.8°C30 Oct 1971 | 83 mm4 Oct 1972 | 247 mm1972 · driest 0 mm in 1969 | 65 |
| November | 27.0°C2 Nov 2022 | -12.3°C19 Nov 1993 | 48 mm1 Nov 1967 | 148 mm2025 · driest 1 mm in 1986 | 65 |
| December | 20.5°C5 Dec 1985 | -17.9°C26 Dec 2002 | 46 mm21 Dec 1968 | 149 mm1969 · driest 0 mm in 2013 | 65 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 26 | 1 |
| February | 0 | 0 | 19 | <1 |
| March | 0 | 0 | 11 | 1 |
| April | 2 | 0 | 1 | 2 |
| May | 12 | 1 | 0 | 3 |
| June | 22 | 8 | 0 | 3 |
| July | 27 | 14 | 0 | 3 |
| August | 27 | 15 | 0 | 3 |
| September | 13 | 3 | 0 | 2 |
| October | 3 | <1 | 2 | 2 |
| November | 0 | 0 | 9 | 2 |
| December | 0 | 0 | 22 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 20% | 3% | 22% | 1.0–6.9°C |
| February | <1% | 21% | 3% | 24% | 2.3–10.4°C |
| March | 8% | 21% | 3% | 25% | 8.0–15.5°C |
| April | 30% | 27% | 5% | 32% | 15.2–20.4°C |
| May | 56% | 33% | 9% | 44% | 20.2–25.3°C |
| June | 67% | 31% | 10% | 35% | 24.4–28.8°C |
| July | 75% | 24% | 9% | 23% | 26.6–31.2°C |
| August | 79% | 21% | 8% | 19% | 25.7–31.3°C |
| September | 71% | 19% | 6% | 17% | 21.4–26.9°C |
| October | 32% | 19% | 5% | 19% | 14.8–20.4°C |
| November | 4% | 23% | 6% | 29% | 8.0–13.7°C |
| December | 0% | 23% | 5% | 28% | 2.3–7.4°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