San Juan Klimat and Average Väder
Klimat of San Juan: average temperatures, rainfall and seasons month by month.
Klimat in San Juan month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Månad | Avg high | Avg low | Regnfall | Rating |
|---|---|---|---|---|
| januari | 27° | 24° | 57 mm | ★★★★☆ |
| februari | 27° | 23° | 118 mm | ★★★★☆ |
| mars | 27° | 23° | 77 mm | ★★★★☆ |
| april | 28° | 24° | 123 mm | ★★★★☆ |
| maj | 29° | 25° | 87 mm | ★★★★☆ |
| juni | 30° | 26° | 62 mm | ★★★★☆ |
| juli | 30° | 26° | 62 mm | ★★★★☆ |
| augusti | 30° | 26° | 118 mm | ★★★★☆ |
| september | 30° | 26° | 79 mm | ★★★★☆ |
| oktober | 30° | 26° | 126 mm | ★★★☆☆ |
| november | 29° | 25° | 134 mm | ★★★☆☆ |
| december | 28° | 24° | 87 mm | ★★★★☆ |
Klimat type: Temperate. Källa: Open-Meteo archive (ERA5).
Recent extremes in San Juan
Högest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How San Juan compares med nearby places
Annual averages, and the difference against San Juan.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Virgin Islands National Park | 144 km | 25°C | 1°C cooler | 1021 mm |
| Dominican Republic | 403 km | 26°C | 1°C cooler | 1435 mm |
Bästa tiden att besöka San Juan
Go in januari, mars, maj, juni, juli, september and december. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: augusti, oktober and november - expect the least comfortable mix of heat, cold or rain.
What this means for San Juan
Today is about average for september. The forecast high of 30°C is in line med the 30°C typical for this month.
A 100% chance means rain is expected over most of the area. Plan indoor alternatives.
Wet roads are likely; braking distances roughly double in heavy rain.
Northern Hemisphere, so peak summer falls in juni och augusti.
The gap between the warmest and coldest month averages 3°C - an unusually even climate through the year.
What och pack, what och skip
- Lightweight, light-coloured clothing and a refillable water bottle
- sönglasses, a brimmed hat and SPF 30+
- A packable rain shell - 7 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid augusti, oktober and november - historically the least comfortable months here.
Sammanfattning
San Juan is a city in Puerto Rico. San Juan is known for Old San Juan forts and beaches. Befolkningen är cirka 340.000.
Just nu är det 29°C (84°F) in San Juan med mest klart. Det känns som 32°C. I dag varierar temperaturen mellan 28°C och 30°C. Risken för nederbörd är 100%. Sightseeing conditions score 6.3/10 - godtagbart — planera efter vädret.
Bästa tiden att besöka San Juan is januari, mars, maj, juni, juli, september and december. Klimatet är temperate. augusti, oktober and november tend och be the least comfortable months. oktober is the warmest month med average highs near 30°C, while februari is the coldest med lows near 23°C.
Nearby highlights include Virgin Islands National Park.
Enkelt förklarat. Today is about average for september. The forecast high of 30°C is in line med the 30°C typical for this month. The best window och be outside is roughly 7 AM och 10 AM, when temperature, rain chance and wind line up best. fishing is the strongest bet in San Juan today at 7.1/10. Wet roads are likely; braking distances roughly double in heavy rain.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about San Juan
| Typ | City |
|---|---|
| Land | Puerto Rico |
| Kontinent | Nordamerika |
| Koordinater | 18°27′55.8″N 66°6′20.5″W (18.4655, -66.1057) |
| Befolkning | 340.000 |
| Known for | Old San Juan forts and beaches |
| Lokal tid | 9:57 PM (UTC-04:00) |
| Best months | januari, mars, maj, juni, juli, september and december |
| Klimat | Temperate |
Väder map for San Juan
Animated model layers. Pick a layer och load it.
Animated layers by Vindy. For pin-level detail and nearby places, see the interactive map below.
Explore San Juan
Every topic we hold for this place, and the same topic for the places around it.
Klimat for related places
Frequently asked questions
Where is San Juan?
San Juan is a city in Puerto Rico. Its coordinates are 18.4655, -66.1057. It lies in Nordamerika.
What is the weather like in San Juan just nu?
It is currently 29°C (84°F) med mest klart. Luftfuktighet is 73% and wind is 21 km/h.
When is the best time och visit San Juan?
januari, mars, maj, juni, juli, september and december offer the most comfortable conditions in San Juan, which has a temperate climate. augusti, oktober and november are usually the hardest months for outdoor plans.
What time zone is San Juan in?
San Juan observes America/Puerto_Rico (UTC-04:00). The local time is 9:57 PM.
How many people live in San Juan?
San Juan has a population of approximately 340.000.
What are the top things och do in San Juan?
Popular options include Virgin Islands National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (cities-world) - coordinates, hierarchy and facts. |
|---|---|
| Prognos and observations | Open-Meteo (ECMWF and national models). |
| Luftkvalitet and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Klimat averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Väder Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated september 30, 2026 at 9:57 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
