July
Other strong months: August and June
51/100 weather score
United Kingdom · 1991–2020
Best time to visit
Isle of Lewis
For Isle of Lewis, July has the most comfortable weather in our climate comparison. Typical daytime highs are 16.3°C, nights average 10.8°C, and rainfall totals about 75 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.
Best all-round monthJuly
Typical daytime high16.3°C
Typical night-time low10.8°C
July rainfall75 mm
July
Other strong months: August and June
14/100 weather score
July
Other strong months: June and August
66/100 weather score
Make the answer personal
Choose the weather
that suits you.
Set the daytime temperature and rainfall you are comfortable with. We will show only the months that meet every choice, using the measured 1991–2020 averages below.
2 months fit your choices for Isle of Lewis
The lowest comfort score is 5 out of 100. January, February, March, November and December share that score. In January, that is mainly because days reach only 7.6°C, 16° below the 24°C the score treats as ideal.
Quick answers
Planning a trip to Isle of Lewis?
These answers come from the same measured monthly climate record shown on this page.
When is the best time to visit Isle of Lewis?
July is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 16.3°C and 75 mm of rain.
What is the hottest month in Isle of Lewis?
July is hottest in this record, with a typical daytime high of 16.3°C and a night-time low of 10.8°C.
Which month has the least rain?
June has the lowest monthly rainfall total at 65 mm.
Is this a weather forecast?
No. These are long-term measured averages from 1991–2020. Check a current forecast before you travel.
Month by month
See how the weather
changes through the year.
The bars combine daytime temperature, night-time temperature and rainfall. The figures are measured historical averages, not a forecast for a particular trip.
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 7.6°C | 2.6°C | 145 mm | 21.3 | 8.7°C | 7 h 05 | 5 | Strong coverage |
| February | 7.6°C | 2.4°C | 113 mm | 19 | 7.9°C | 9 h 14 | 5 | Strong coverage |
| March | 8.6°C | 3.1°C | 105 mm | 18.5 | 7.6°C | 11 h 35 | 5 | Strong coverage |
| April | 10.5°C | 4.6°C | 74 mm | 16.1 | 8.0°C | 14 h 16 | 19 | Strong coverage |
| May | 12.7°C | 6.3°C | 69 mm | 15 | 9.3°C | 16 h 41 | 31 | Strong coverage |
| June | 14.5°C | 9°C | 65 mm | 14 | 11.1°C | 18 h 12 | 44 | Strong coverage |
| July | 16.3°C | 10.8°C | 75 mm | 15 | 12.7°C | 17 h 35 | 51 | Strong coverage |
| August | 16.3°C | 10.9°C | 88 mm | 15.7 | 13.4°C | 15 h 22 | 49 | Strong coverage |
| September | 14.7°C | 9.4°C | 104 mm | 17 | 13.1°C | 12 h 43 | 37 | Strong coverage |
| October | 12°C | 6.9°C | 133 mm | 21 | 12.2°C | 10 h 08 | 16 | Strong coverage |
| November | 9.5°C | 4.4°C | 128 mm | 21.6 | 11.2°C | 7 h 44 | 5 | Strong coverage |
| December | 7.9°C | 2.6°C | 139 mm | 21.2 | 9.9°C | 6 h 26 | 5 | Strong coverage |
What has changed
Recent daytime highs are
0.9°C warmer in Isle of Lewis.
Each bar shows the difference between the 2011–2025 average daytime high and the 1961–1990 average for the same month at the same station. A blank month does not have enough older observations for a reliable comparison.
Jan
+0.7
Feb
+1.1
Mar
+1.0
Apr
+1.2
May
+1.1
Jun
+0.7
Jul
+1.2
Aug
+0.7
Sep
+0.9
Oct
+0.4
Nov
+1.2
Dec
+0.8
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 14.4°C10 Jan 1998 | -12.2°C21 Jan 1960 | 65 mm19 Jan 1989 | 276 mm1993 · driest 25 mm in 1963 | 151 |
| February | 13.9°C25 Feb 1900 | -11.1°C19 Feb 1892 | 40 mm4 Feb 1990 | 280 mm1997 · driest 10 mm in 1963 | 153 |
| March | 20.0°C9 Mar 1949 | -10.6°C21 Mar 1881 | 28 mm22 Mar 1954 | 208 mm1990 · driest 19 mm in 1969 | 153 |
| April | 20.8°C17 Apr 2003 | -8.9°C1 Apr 1917 | 44 mm27 Apr 1959 | 146 mm1947 · driest 1 mm in 1974 | 152 |
| May | 23.9°C29 May 1908 | -4.4°C8 May 1938 | 39 mm30 May 2007 | 153 mm2011 · driest 13 mm in 2008 | 153 |
| June | 25.6°C2 Jun 1911 | -0.6°C2 Jun 1888 | 46 mm4 Jun 1937 | 115 mm1994 · driest 14 mm in 1982 | 153 |
| July | 26.2°C15 Jul 2003 | 0.0°C7 Jul 1888 | 40 mm12 Jul 1939 | 165 mm1988 · driest 14 mm in 1955 | 153 |
| August | 26.3°C3 Aug 1999 | -3.9°C30 Aug 1891 | 70 mm27 Aug 1933 | 205 mm1982 · driest 13 mm in 1947 | 153 |
| September | 25.0°C1 Sep 1906 | -0.4°C21 Sep 1964 | 49 mm4 Sep 1936 | 207 mm1981 · driest 23 mm in 1933 | 153 |
| October | 21.1°C5 Oct 1898 | -4.4°C27 Oct 1948 | 64 mm30 Oct 1989 | 233 mm1989 · driest 20 mm in 1946 | 153 |
| November | 16.3°C6 Nov 2003 | -14.4°C27 Nov 1895 | 38 mm10 Nov 2022 | 229 mm1981 · driest 24 mm in 1945 | 153 |
| December | 14.4°C2 Dec 1948 | -16.7°C19 Dec 1953 | 44 mm17 Dec 1989 | 268 mm2015 · driest 30 mm in 2002 | 153 |
| Month | Days 25°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|
| January | 0 | 5 | 5 |
| February | 0 | 5 | 3 |
| March | 0 | 4 | 3 |
| April | 0 | 2 | 1 |
| May | 0 | <1 | 2 |
| June | 0 | 0 | 2 |
| July | <1 | 0 | 2 |
| August | 0 | 0 | 2 |
| September | 0 | 0 | 3 |
| October | 0 | <1 | 4 |
| November | 0 | 2 | 4 |
| December | 0 | 6 | 4 |
| Month | Dry days reaching 20°C | Wet days | Days with heavy rain | Weeks with 3+ wet days | Typical high by year |
|---|---|---|---|---|---|
| January | 0% | 70% | 13% | 86% | 5.3–8.4°C |
| February | 0% | 64% | 10% | 80% | 5.4–8.5°C |
| March | 0% | 60% | 8% | 78% | 6.4–9.6°C |
| April | <1% | 56% | 4% | 72% | 8.6–11.3°C |
| May | 1% | 47% | 4% | 63% | 10.9–13.9°C |
| June | 3% | 48% | 5% | 68% | 13.3–15.9°C |
| July | 5% | 52% | 6% | 73% | 14.7–17.3°C |
| August | 4% | 54% | 8% | 75% | 14.6–17.0°C |
| September | <1% | 62% | 11% | 80% | 13.1–15.5°C |
| October | 0% | 70% | 13% | 87% | 10.2–13.0°C |
| November | 0% | 72% | 12% | 89% | 7.6–10.5°C |
| December | 0% | 72% | 13% | 89% | 5.8–9.0°C |
A dry day reaching 20°C records under 1 mm of rain. A wet day records at least 1 mm, while a heavy-rain day records at least 10 mm. The weekly figure is the share of seven-day periods containing three or more wet days. The final column shows the middle 80% of average daytime highs recorded for that month in individual years; a wider range means conditions have varied more from one year to another.
The evidence behind this page
Where these figures
come from.
- Place identity
- GeoNames 8299620
- NOAA station
- UK000003026 · STORNOWAY AIRPORT
- Station distance
- 13 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 30 usable years
- Daylight
- Calculated from latitude 58.22°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 11 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Isle of Lewis is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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