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Hillsborough, Grenada climate
Aw Tropical savanna (dry winter)
Hillsborough has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is May with an average daily high near 89°F, while the coldest is January averaging around 73°F at night. Precipitation totals about 63 inches a year and is strongly seasonal — July alone averages 12.8 inches while March barely receives 0.82 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Hillsborough climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 87 | 87 | 88 | 89 | 89 | 88 | 88 | 89 | 89 | 89 | 88 | 87 |
| Avg temp (°F) | 80 | 80 | 81 | 82 | 83 | 82 | 82 | 82 | 83 | 83 | 82 | 80 |
| Avg low (°F) | 73 | 73 | 74 | 76 | 77 | 76 | 76 | 76 | 76 | 77 | 75 | 74 |
| Precipitation (in) | 2.2 | 1.7 | 0.8 | 1.7 | 2.1 | 6.8 | 12.8 | 10.5 | 8.0 | 5.0 | 7.8 | 3.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 87 | 87 | 88 | 89 | 89 | 88 |
| Avg temp (°F) | 80 | 80 | 81 | 82 | 83 | 82 |
| Avg low (°F) | 73 | 73 | 74 | 76 | 77 | 76 |
| Precipitation (in) | 2.2 | 1.7 | 0.8 | 1.7 | 2.1 | 6.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 89 | 89 | 89 | 88 | 87 |
| Avg temp (°F) | 82 | 82 | 83 | 83 | 82 | 80 |
| Avg low (°F) | 76 | 76 | 76 | 77 | 75 | 74 |
| Precipitation (in) | 12.8 | 10.5 | 8.0 | 5.0 | 7.8 | 3.6 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 7 | 5 | 5 | 8 | 12 | 12 | 12 | 11 | 11 | 14 | 10 |
| Days with high ≥ 90°F (days) | — | 0.1 | 2 | 6 | 13 | 6 | 1 | 6 | 11 | 8 | 3 | 0.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 7 | 5 | 5 | 8 | 12 |
| Days with high ≥ 90°F (days) | — | 0.1 | 2 | 6 | 13 | 6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 12 | 11 | 11 | 14 | 10 |
| Days with high ≥ 90°F (days) | 1 | 6 | 11 | 8 | 3 | 0.6 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 44 | 46 | 48 | 54 | 55 | 64 | 53 | 49 | 52 | 59 | 59 | 50 |
| Relative humidity (%) | 77 | 77 | 77 | 78 | 80 | 81 | 81 | 81 | 81 | 81 | 81 | 79 |
| Wind speed (mph) | 14.7 | 14.9 | 14.3 | 14.1 | 14.2 | 14.5 | 13.0 | 11.3 | 10.9 | 11.4 | 12.5 | 14.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 44 | 46 | 48 | 54 | 55 | 64 |
| Relative humidity (%) | 77 | 77 | 77 | 78 | 80 | 81 |
| Wind speed (mph) | 14.7 | 14.9 | 14.3 | 14.1 | 14.2 | 14.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 49 | 52 | 59 | 59 | 50 |
| Relative humidity (%) | 81 | 81 | 81 | 81 | 81 | 79 |
| Wind speed (mph) | 13.0 | 11.3 | 10.9 | 11.4 | 12.5 | 14.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 11 years of daily observations at Crown Point Airport Tobago, a weather station, about 163 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.