Weather in Limón in October
Costa Rica · 20-year averages, October
Shoulder season. October is shoulder season in Limón — cheaper, quieter, and a genuine gamble. You should expect rain on 30 days of the month, which is more days wet than dry.
Limón barely has seasons. October scores 51 out of 100 against a best of 64 in February — a gap small enough that the month you choose matters far less here than the week you choose.
Rain on 30 of the month's 31 days, 11 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 88% nothing dries, including you.
What the averages hide
Averages flatten a month, and this one hides a few things: the day barely swings — 3.1 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest October day reached 31 °C and the coldest night fell to 23.5 °C, and the wettest single day dropped 219 mm — roughly 63% of the month's rain in one day.
October is moderately variable: 145 mm in the driest year against 737 mm in the wettest, around an average of 348 mm. Roughly two Octobers in three land near that average, and the third does something else entirely.
Wind is light at 3.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 88% is the real story though — it is the number that decides how the day feels, not the 28.6 °C.
How October sits in the year
Temperatures hold steady either side: 28.9 °C in September, 28.6 here, 28.2 in November. Nothing about the timing within the month matters much.
Daylight in October
Limón sits close enough to the equator that daylight barely moves all year — 11.9 hours in October, against a range of just 1.2 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.
Sea temperature
The sea sits at about 29.1 °C in October — warm enough that the water offers no relief from the heat. This is the warmest the water gets all year.
How busy it gets
Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.
Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.
October in Limón versus nearby
If Limón is one option among several, the nearby comparison is worth making. San Isidro is a better bet in October — 3 °C cooler, 3 days less rain. San José is a better bet in October — 6 °C cooler, 4 days less rain.
So: October works, with February the better month by 13 points if the dates can move. If they cannot, nothing here should stop you booking.
Every month in Limón
| Month | High °C | Low °C | Rain days | Rain mm | Humidity % | Daylight h | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|
| January | 27.7 | 24.2 | 17 | 170 | 85 | 11.6 | 27.4 | 58 |
| February | 28.1 | 24 | 15 | 98 | 83 | 11.8 | 27.3 | 64 |
| March | 28.8 | 24.2 | 16 | 106 | 82 | 12.1 | 27.6 | 60 |
| April | 29.7 | 25 | 19 | 143 | 82 | 12.3 | 28.1 | 51 |
| May | 29.5 | 25.7 | 28 | 288 | 86 | 12.6 | 28.6 | 48 |
| June | 28.9 | 25.8 | 29 | 294 | 88 | 12.7 | 28.8 | 49 |
| July | 28.5 | 25.4 | 29 | 311 | 89 | 12.7 | 28.3 | 50 |
| August | 28.7 | 25.5 | 29 | 254 | 88 | 12.5 | 28.6 | 50 |
| September | 28.9 | 25.5 | 29 | 260 | 87 | 12.2 | 29.1 | 50 |
| October | 28.6 | 25.5 | 30 | 348 | 88 | 11.9 | 29.1 | 51 |
| November | 28.2 | 25.1 | 27 | 349 | 89 | 11.7 | 28.5 | 51 |
| December | 28.1 | 24.7 | 23 | 222 | 87 | 11.5 | 27.9 | 54 |
See all twelve months in Limón, or where else to go in October.
Planning the rest of the trip
- Flight time to Limón how long you are actually in the air
- Limón time zone and the difference from home
- Days until your trip count down to the departure date