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Weather and VanSky index

Portmore, Jamaica — weather and VanSky index

City · Saint Catherine Parish, Jamaica

27°

Partly cloudy day 29° · night 23°

Wind is calm — safe to open the awning and leave it out overnight.
High condensation risk — ventilate before sleep and leave a small gap in the roof vent.

Wind 14 km/h Precip 0.0 mm Feels like 31° Humidity 77% Sunrise 06:04 Sunset 17:37 Solar 2.2 kWh Dew point 23° Air AQI 39

VanSky Indextravel comfort how it works

Today 46/100 Acceptable

Week 29/100 Challenging

Index by day- - - Week 29

46today 45we 45th 22fr 22sa 28su 37mo

A poor week Comfortable days: 0 of 7. Best window: Tu–Th. Low point: fr 30 Oct (22, rain).

Portmore this week

Portmore: the VanSky index for 27 Oct – 2 Nov is 29 out of 100, “Challenging”.
Comfortable days: 0 of 7.
Best window: Tu–Th.
Low point: fr 30 Oct (22, rain).
Today: 46 out of 100 (acceptable).
Forecast updated 27 Oct, 23:06 UTC.

Daily forecast

The week is 1.3 °C warmer than normal for these dates · tap a day for details

80+ ideal 60–79 comfortable 40–59 acceptable 20–39 challenging 0–19 extreme

00:00 25° Clear 62 0.0 mm

03:00 24° Partly cloudy 65 0.0 mm

06:00 23° Partly cloudy 69 0.0 mm

09:00 27° Clear 53 0.0 mm

12:00 29° Partly cloudy 48 0.0 mm

15:00 29° Partly cloudy 53 0.0 mm

18:00 27° Partly cloudy 55 0.0 mm

21:00 26° Partly cloudy 55 0.0 mm

Index 46 · acceptable — what it is made of Weighted 56, adjustments −10 (night, extremes, sea, air) → 46 · how it works

Thermal comfort 35% 18

Sunshine 25% 44

Precipitation 25% 93

Wind 15% 100

Portmore on map

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Weather and index by day of year

2021–2025 archive

28 October 28° / 25°

water 30°

Rain is common Rain or snow on 19 of 35 archive days

October · average days

3 clear

5 partly cloudy

1 overcast

21 with rain or snow

≈ kWh

28° / 25°

day night

Best time to visit January — March Within 5 points of the highest-scoring month

This week · daily average

35 vs usual 33 ≈

Daytime average 30° · usual 29° +1°

About usual for these dates. Tiles: the forecast next to the usual weather for that date — sky, day/night temperature, index; the difference below.

Today 27 Oct

forecast 29°/23° 46

usual 29°/25° 36

▲ 10 ≈

we 28 Oct

forecast 29°/23° 45

usual 28°/25° 37

▲ 8 +1°

th 29 Oct

forecast 30°/21° 45

usual 29°/24° 32

▲ 13 +1°

fr 30 Oct

forecast 30°/24° 22

usual 29°/24° 32

▼ 10 +1°

sa 31 Oct

forecast 30°/24° 22

usual 29°/25° 32

▼ 10 +1°

su 1 Nov

forecast 32°/25° 28

usual 29°/24° 32

▼ 4 +3°

mo 2 Nov

forecast 31°/24° 37

usual 29°/24° 32

▲ 5 +2°

Climate: ERA5, Copernicus Climate Change Service (C3S).

Where the week is better

27 Oct – 2 Nov · weekly average

#	City	Index
1	Port Antonio 27° / 21° 1 day of rain 2.0 kWh	57
2	Saint Ann’s Bay 28° / 20° 2 days of rain 2.0 kWh	55
3	Mandeville 28° / 20° 2 days of rain 2.1 kWh	55
4	Kingston 27° / 21° 4 days of rain 2.1 kWh	50
5	New Kingston 27° / 21° 4 days of rain 2.1 kWh	50
6	Torrington Park 27° / 21° 4 days of rain 2.1 kWh	50
7	Mountain View Gardens 27° / 21° 4 days of rain 2.1 kWh	50
…	Portmore 30° / 23° 2 days of rain 2.1 kWh	29

#	City	Index by day	Index
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City	Index by day	Index
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All cities: Jamaica

Frequently Asked Questions

The weekly VanSky index for Portmore is 29 out of 100. It is the average of the daily scores, adjusted for swings in the weather: the more uneven the week, the lower the score. Above 60 means comfortable conditions for staying, below 40 means it is worth looking elsewhere. The 7-day forecast is further up this page.

Today a 500 W panel setup will produce about 2.2 kWh in Portmore. The estimate uses the cloud forecast and the length of daylight. Set your own panel power with the “My panels” control at the top of the page and the figures will update.

The daily score for Portmore combines thermal comfort (temperature and humidity) at 35%, sunshine at 25%, precipitation at 25% and wind at 15%. Frost, storms, extreme heat or heavy rain pull the day's score down sharply. The weekly score is the daily average, adjusted for swings in the weather.

VanSky Index

A weather comfort index for travel: a 0–100 score. Recalculated daily from live weather data — temperature, rainfall, wind and sun.

80–100Ideal

60–79Comfortable

40–59Acceptable

20–39Challenging

0–19Extreme

How it's calculated:

Thermal comfort 35% — temperature + humidity

Sunshine 25% — panel charge, mood; in heat the sun is no longer a bonus

Precipitation 25% — rain → muddy ground

Wind 15% — awning, driving, noise

Extremes override all: frost, heat, storm, downpour

Heat counts by feels-like temperature: at 32°+ the score can’t reach “Comfortable”, muggy nights lower it further

A dangerous day drags the week down: a storm or downpour in the forecast keeps the week from being “Comfortable”

Bonus: warm sea, high panel output

Data: Open-Meteo · Updated several times a day

VanSky index for Portmore, Jamaica — 29 out of 100 (Challenging). Decide in seconds: temperature, precipitation, wind and solar output. Data refreshed several times a day from real weather observations. Forecast updated 27 Oct, 23:06 UTC.