July
July · August · June
United Kingdom · 1991–2020
July leads for comfortable weather in St Ives: typically 18.7°C by day, 13.2°C at night, with 72 mm of rain. Based on measured 1991–2020 NOAA station history.
July · August · June
July · August · June
June · July · August
The weakest month is January, scoring 8 against July’s 67 — days reach only 9.2°C, 15° 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 | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 9.2°C | 4.7°C | 120 mm | 17 | 10.4°C | 8 h 29 | 8 | Strong coverage |
| February | 9.2°C | 4.5°C | 97 mm | 14.5 | 9.8°C | 9 h 59 | 13 | Strong coverage |
| March | 10.3°C | 5.4°C | 72 mm | 12.7 | 9.5°C | 11 h 42 | 24 | Strong coverage |
| April | 12.1°C | 6.6°C | 77 mm | 12.3 | 10.2°C | 13 h 42 | 31 | Strong coverage |
| May | 14.6°C | 8.8°C | 60 mm | 10.1 | 11.8°C | 15 h 24 | 48 | Strong coverage |
| June | 16.9°C | 11.3°C | 59 mm | 9.6 | 14.0°C | 16 h 22 | 61 | Strong coverage |
| July | 18.7°C | 13.2°C | 72 mm | 10.7 | 16.0°C | 15 h 59 | 67 | Strong coverage |
| August | 19°C | 13.4°C | 79 mm | 12.1 | 16.5°C | 14 h 29 | 66 | Strong coverage |
| September | 17.4°C | 12°C | 82 mm | 12.2 | 15.7°C | 12 h 33 | 58 | Strong coverage |
| October | 14.6°C | 9.9°C | 113 mm | 15.4 | 14.4°C | 10 h 38 | 38 | Strong coverage |
| November | 11.7°C | 7.3°C | 132 mm | 18.1 | 13.0°C | 8 h 56 | 19 | Strong coverage |
| December | 10°C | 5.5°C | 127 mm | 17.4 | 11.5°C | 8 h 04 | 11 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 15.5°C10 Jan 1998 | -9.4°C13 Jan 1987 | 34 mm4 Jan 2025 | 242 mm2026 · driest 20 mm in 1992 | 48 |
| February | 16.0°C26 Feb 2019 | -6.8°C7 Feb 1991 | 37 mm5 Feb 1996 | 213 mm2007 · driest 14 mm in 1993 | 48 |
| March | 18.5°C30 Mar 2021 | -5.2°C1 Mar 2018 | 38 mm21 Mar 2013 | 161 mm1981 · driest 18 mm in 1990 | 48 |
| April | 22.3°C19 Apr 2019 | -2.3°C3 Apr 2013 | 36 mm15 Apr 2025 | 180 mm1998 · driest 5 mm in 1984 | 48 |
| May | 26.9°C24 May 2026 | 0.3°C5 May 1979 | 37 mm22 May 1984 | 122 mm2007 · driest 5 mm in 1989 | 48 |
| June | 27.7°C19 Jun 2017 | 4.8°C2 Jun 1989 | 47 mm5 Jun 1997 | 142 mm2012 · driest 6 mm in 1984 | 48 |
| July | 30.4°C17 Jul 2022 | 7.2°C21 Jul 1980 | 38 mm24 Jul 2003 | 222 mm2009 · driest 8 mm in 1999 | 48 |
| August | 29.4°C3 Aug 1990 | 7.4°C20 Aug 1986 | 68 mm17 Aug 2004 | 195 mm1997 · driest 5 mm in 1981 | 47 |
| September | 27.1°C5 Sep 2023 | 4.8°C21 Sep 1986 | 50 mm14 Sep 2000 | 182 mm1981 · driest 8 mm in 2014 | 48 |
| October | 23.1°C8 Oct 2023 | -0.3°C17 Oct 1993 | 40 mm5 Oct 2012 | 238 mm1987 · driest 21 mm in 1978 | 48 |
| November | 17.0°C5 Nov 2003 | -3.8°C28 Nov 2010 | 58 mm23 Nov 2024 | 242 mm2002 · driest 38 mm in 1988 | 48 |
| December | 15.3°C2 Dec 1985 | -4.7°C29 Dec 1996 | 58 mm27 Dec 1979 | 278 mm1978 · driest 2 mm in 1995 | 48 |
| Month | Days 25°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|
| January | 0 | 2 | 4 |
| February | 0 | 2 | 3 |
| March | 0 | 1 | 2 |
| April | 0 | <1 | 2 |
| May | 0 | 0 | 2 |
| June | <1 | 0 | 2 |
| July | <1 | 0 | 2 |
| August | <1 | 0 | 2 |
| September | 0 | 0 | 2 |
| October | 0 | 0 | 4 |
| November | 0 | <1 | 4 |
| December | 0 | 2 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 56% | 14% | 72% | 7.2–10.4°C |
| February | 0% | 51% | 12% | 66% | 7.2–10.8°C |
| March | 0% | 45% | 8% | 58% | 8.8–11.3°C |
| April | 1% | 39% | 7% | 49% | 10.7–13.5°C |
| May | 4% | 33% | 6% | 42% | 12.7–16.4°C |
| June | 11% | 33% | 6% | 43% | 15.5–18.4°C |
| July | 22% | 34% | 6% | 46% | 17.3–21.0°C |
| August | 20% | 37% | 7% | 49% | 17.7–20.5°C |
| September | 8% | 41% | 8% | 55% | 16.2–18.4°C |
| October | <1% | 52% | 13% | 70% | 13.3–15.9°C |
| November | 0% | 60% | 14% | 80% | 10.7–12.8°C |
| December | 0% | 58% | 14% | 77% | 8.7–11.2°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