Home › Cities › United Kingdom › England › Harlow
Harlow, England climate
Cfb Oceanic / temperate
Harlow has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 22°C, while the coldest is January averaging around 1°C at night. Precipitation is fairly even year-round, totalling about 720 mm. At latitude 52°N, day length swings from 7.6 hours in midwinter to 16.4 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsHarlow climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 11 | 14 | 17 | 20 | 22 | 22 | 19 | 14 | 10 | 8 |
| Avg temp (°C) | 4 | 5 | 7 | 9 | 12 | 15 | 17 | 17 | 14 | 11 | 7 | 5 |
| Avg low (°C) | 1 | 1 | 3 | 4 | 7 | 10 | 12 | 12 | 10 | 7 | 4 | 2 |
| Precipitation (mm) | 69 | 51 | 43 | 52 | 49 | 53 | 53 | 68 | 57 | 79 | 78 | 68 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 11 | 14 | 17 | 20 |
| Avg temp (°C) | 4 | 5 | 7 | 9 | 12 | 15 |
| Avg low (°C) | 1 | 1 | 3 | 4 | 7 | 10 |
| Precipitation (mm) | 69 | 51 | 43 | 52 | 49 | 53 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 19 | 14 | 10 | 8 |
| Avg temp (°C) | 17 | 17 | 14 | 11 | 7 | 5 |
| Avg low (°C) | 12 | 12 | 10 | 7 | 4 | 2 |
| Precipitation (mm) | 53 | 68 | 57 | 79 | 78 | 68 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 20 | 17 | 16 | 15 | 13 | 13 | 13 | 15 | 15 | 20 | 22 | 20 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | 0.1 | 0.1 | 0.3 | — | — | — | — |
| Days with low ≤ 0°C (days) | 11 | 11 | 7 | 3 | 0.4 | — | — | — | — | 0.9 | 5 | 11 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 20 | 17 | 16 | 15 | 13 | 13 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | 0.1 |
| Days with low ≤ 0°C (days) | 11 | 11 | 7 | 3 | 0.4 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 13 | 15 | 15 | 20 | 22 | 20 |
| Days with high ≥ 32°C (days) | 0.1 | 0.3 | — | — | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 0.9 | 5 | 11 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 74 | 74 | 69 | 69 | 71 | 67 | 68 | 68 | 72 | 75 | 74 |
| Clear days (≤ 30% cloud) | 2 | 2 | 2 | 3 | 3 | 2 | 3 | 3 | 3 | 2 | 1 | 2 |
| Partly cloudy days (30–70%) | 9 | 9 | 9 | 10 | 10 | 10 | 12 | 12 | 12 | 10 | 9 | 10 |
| Cloudy days (≥ 70%) | 20 | 18 | 20 | 17 | 18 | 18 | 16 | 17 | 16 | 19 | 19 | 20 |
| Relative humidity (%) | 93 | 89 | 85 | 81 | 79 | 79 | 78 | 79 | 82 | 87 | 92 | 94 |
| Wind speed (mph) | 9.2 | 9.1 | 8.6 | 7.5 | 7.3 | 6.8 | 6.6 | 6.9 | 7.4 | 8.3 | 8.3 | 8.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 74 | 74 | 69 | 69 | 71 |
| Clear days (≤ 30% cloud) | 2 | 2 | 2 | 3 | 3 | 2 |
| Partly cloudy days (30–70%) | 9 | 9 | 9 | 10 | 10 | 10 |
| Cloudy days (≥ 70%) | 20 | 18 | 20 | 17 | 18 | 18 |
| Relative humidity (%) | 93 | 89 | 85 | 81 | 79 | 79 |
| Wind speed (mph) | 9.2 | 9.1 | 8.6 | 7.5 | 7.3 | 6.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 68 | 68 | 72 | 75 | 74 |
| Clear days (≤ 30% cloud) | 3 | 3 | 3 | 2 | 1 | 2 |
| Partly cloudy days (30–70%) | 12 | 12 | 12 | 10 | 9 | 10 |
| Cloudy days (≥ 70%) | 16 | 17 | 16 | 19 | 19 | 20 |
| Relative humidity (%) | 78 | 79 | 82 | 87 | 92 | 94 |
| Wind speed (mph) | 6.6 | 6.9 | 7.4 | 8.3 | 8.3 | 8.7 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Rothamsted, a weather station, about 17 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.