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Newark, Delaware climate
Cfa Humid subtropical
Newark has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 31°C, while the coldest is January averaging around −4°C at night. Precipitation is fairly even year-round, totalling about 1193 mm.
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 countsNewark climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 6 | 8 | 12 | 19 | 24 | 29 | 31 | 30 | 26 | 21 | 14 | 8 |
| Avg temp (°C) | 1 | 2 | 6 | 13 | 18 | 23 | 25 | 24 | 21 | 14 | 8 | 4 |
| Avg low (°C) | −4 | −4 | 0 | 6 | 11 | 16 | 19 | 18 | 15 | 8 | 2 | −1 |
| Precipitation (mm) | 87 | 74 | 108 | 94 | 92 | 100 | 123 | 100 | 124 | 102 | 85 | 103 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 6 | 8 | 12 | 19 | 24 | 29 |
| Avg temp (°C) | 1 | 2 | 6 | 13 | 18 | 23 |
| Avg low (°C) | −4 | −4 | 0 | 6 | 11 | 16 |
| Precipitation (mm) | 87 | 74 | 108 | 94 | 92 | 100 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 30 | 26 | 21 | 14 | 8 |
| Avg temp (°C) | 25 | 24 | 21 | 14 | 8 | 4 |
| Avg low (°C) | 19 | 18 | 15 | 8 | 2 | −1 |
| Precipitation (mm) | 123 | 100 | 124 | 102 | 85 | 103 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 7 | 9 | 9 | 10 | 6 | 8 | 6 | 8 | 7 | 6 | 9 |
| Days with high ≥ 32°C (days) | — | — | — | 0.2 | 2 | 4 | 11 | 6 | 2 | 0.1 | — | — |
| Days with low ≤ 0°C (days) | 20 | 16 | 12 | 3 | — | — | — | — | — | 0.8 | 8 | 18 |
| Days with snowfall ≥ 2.5 cm (days) | 0.6 | 0.5 | 0.2 | — | — | — | — | — | — | — | — | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 7 | 9 | 9 | 10 | 6 |
| Days with high ≥ 32°C (days) | — | — | — | 0.2 | 2 | 4 |
| Days with low ≤ 0°C (days) | 20 | 16 | 12 | 3 | — | — |
| Days with snowfall ≥ 2.5 cm (days) | 0.6 | 0.5 | 0.2 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 6 | 8 | 7 | 6 | 9 |
| Days with high ≥ 32°C (days) | 11 | 6 | 2 | 0.1 | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 0.8 | 8 | 18 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | 0.1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 62 | 62 | 62 | 62 | 59 | 55 | 54 | 54 | 54 | 59 | 63 |
| Clear days (≤ 30% cloud) | 5 | 5 | 6 | 6 | 5 | 6 | 7 | 8 | 9 | 10 | 7 | 5 |
| Partly cloudy days (30–70%) | 11 | 10 | 11 | 9 | 12 | 12 | 13 | 12 | 10 | 10 | 11 | 11 |
| Cloudy days (≥ 70%) | 14 | 13 | 15 | 15 | 14 | 12 | 11 | 11 | 11 | 12 | 12 | 15 |
| Relative humidity (%) | 84 | 83 | 81 | 78 | 79 | 76 | 71 | 72 | 74 | 77 | 80 | 84 |
| Wind speed (mph) | 7.0 | 7.1 | 7.3 | 6.8 | 5.6 | 5.1 | 4.6 | 4.5 | 5.1 | 5.7 | 6.0 | 6.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 62 | 62 | 62 | 62 | 59 |
| Clear days (≤ 30% cloud) | 5 | 5 | 6 | 6 | 5 | 6 |
| Partly cloudy days (30–70%) | 11 | 10 | 11 | 9 | 12 | 12 |
| Cloudy days (≥ 70%) | 14 | 13 | 15 | 15 | 14 | 12 |
| Relative humidity (%) | 84 | 83 | 81 | 78 | 79 | 76 |
| Wind speed (mph) | 7.0 | 7.1 | 7.3 | 6.8 | 5.6 | 5.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 54 | 54 | 54 | 59 | 63 |
| Clear days (≤ 30% cloud) | 7 | 8 | 9 | 10 | 7 | 5 |
| Partly cloudy days (30–70%) | 13 | 12 | 10 | 10 | 11 | 11 |
| Cloudy days (≥ 70%) | 11 | 11 | 11 | 12 | 12 | 15 |
| Relative humidity (%) | 71 | 72 | 74 | 77 | 80 | 84 |
| Wind speed (mph) | 4.6 | 4.5 | 5.1 | 5.7 | 6.0 | 6.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Newark AG Farm (NOAA GHCN station USC00076410), about 2 km from the city centre.
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.