July
July · August · June
Finland · 1991–2020
July leads for comfortable weather in Iitti: typically 22.9°C by day, 11.5°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.
July · August · June
July · August · June
June · August · July
The weakest month is January, scoring 5 against July’s 77 — days reach only -2.2°C, 26° 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 | -2.2°C | -8.5°C | 50 mm | 11.7 | 6 h 24 | 5 | Good coverage |
| February | -3.3°C | -11°C | 37 mm | 9.1 | 8 h 53 | 5 | Good coverage |
| March | 1.8°C | -7°C | 35 mm | 7.9 | 11 h 32 | 5 | Good coverage |
| April | 8.6°C | -1.3°C | 30 mm | 7.2 | 14 h 32 | 16 | Good coverage |
| May | 15.4°C | 3.2°C | 40 mm | 8.3 | 17 h 19 | 45 | Good coverage |
| June | 20°C | 8.7°C | 67 mm | 9.9 | 19 h 10 | 65 | Good coverage |
| July | 22.9°C | 11.5°C | 82 mm | 9.9 | 18 h 23 | 77 | Good coverage |
| August | 21.1°C | 10.1°C | 70 mm | 10.1 | 15 h 46 | 71 | Good coverage |
| September | 15°C | 5.5°C | 55 mm | 9.2 | 12 h 47 | 45 | Good coverage |
| October | 7.9°C | 1.5°C | 68 mm | 12.1 | 9 h 55 | 10 | Good coverage |
| November | 1.7°C | -3°C | 60 mm | 11.2 | 7 h 11 | 5 | Good coverage |
| December | -0.9°C | -6.4°C | 49 mm | 11.3 | 5 h 37 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 7.5°C28 Jan 1992 | -37.7°C8 Jan 1987 | 23 mm31 Jan 2004 | 90 mm2005 · driest 9 mm in 1996 | 48 |
| February | 10.0°C23 Feb 1990 | -36.8°C15 Feb 1979 | 23 mm4 Feb 1999 | 87 mm1999 · driest 2 mm in 1994 | 48 |
| March | 16.3°C27 Mar 2007 | -33.2°C19 Mar 1963 | 22 mm3 Mar 2000 | 67 mm1989 · driest 3 mm in 1969 | 48 |
| April | 23.9°C24 Apr 2000 | -21.5°C2 Apr 1960 | 27 mm25 Apr 1966 | 78 mm1970 · driest 2 mm in 2004 | 48 |
| May | 30.2°C30 May 1995 | -7.5°C1 May 1961 | 36 mm31 May 1988 | 106 mm1995 · driest 2 mm in 1978 | 48 |
| June | 31.5°C12 Jun 1977 | -2.6°C5 Jun 1962 | 68 mm17 Jun 1983 | 130 mm1987 · driest 5 mm in 1970 | 48 |
| July | 33.0°C28 Jul 1994 | 1.6°C8 Jul 1964 | 88 mm8 Jul 1980 | 193 mm2004 · driest 10 mm in 1994 | 48 |
| August | 30.9°C3 Aug 1967 | -2.6°C29 Aug 1966 | 43 mm2 Aug 1976 | 186 mm1972 · driest 8 mm in 2002 | 48 |
| September | 27.2°C6 Sep 1968 | -8.5°C29 Sep 1976 | 46 mm12 Sep 1962 | 167 mm1962 · driest 13 mm in 2002 | 48 |
| October | 17.8°C5 Oct 2005 | -18.5°C23 Oct 2002 | 35 mm9 Oct 1973 | 155 mm2006 · driest 17 mm in 2002 | 48 |
| November | 11.2°C6 Nov 1967 | -24.4°C29 Nov 1995 | 27 mm18 Nov 1991 | 140 mm1996 · driest 4 mm in 1993 | 48 |
| December | 9.4°C15 Dec 2006 | -35.0°C17 Dec 1978 | 22 mm20 Dec 1970 | 103 mm1999 · driest 9 mm in 1978 | 48 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 |
| February | 0 | 0 | 27 | <1 |
| March | 0 | 0 | 27 | <1 |
| April | 0 | 0 | 18 | <1 |
| May | <1 | <1 | 7 | 1 |
| June | 4 | <1 | <1 | 2 |
| July | 9 | 1 | 0 | 2 |
| August | 6 | <1 | 0 | 3 |
| September | <1 | 0 | 5 | 1 |
| October | 0 | 0 | 12 | 2 |
| November | 0 | 0 | 20 | 2 |
| December | 0 | 0 | 25 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 33% | 2% | 45% | -8.5–-0.3°C |
| February | 0% | 29% | 1% | 36% | -8.7–1.0°C |
| March | 0% | 26% | 1% | 32% | -1.6–3.4°C |
| April | 1% | 25% | 2% | 28% | 5.3–10.2°C |
| May | 19% | 24% | 3% | 28% | 13.1–17.8°C |
| June | 40% | 30% | 6% | 38% | 17.5–22.7°C |
| July | 52% | 33% | 8% | 44% | 19.5–25.1°C |
| August | 39% | 35% | 8% | 49% | 17.6–22.5°C |
| September | 6% | 35% | 5% | 46% | 11.9–16.4°C |
| October | 0% | 37% | 5% | 51% | 5.2–10.1°C |
| November | 0% | 41% | 4% | 55% | -1.0–4.6°C |
| December | 0% | 38% | 2% | 50% | -5.8–1.5°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