Peak in March
Coolest in December
Heavy in September
Peak in dry season
San Jose Monthly Weather Guide
Click any month to explore daily weather forecasts
January
February
March
April
May
June
July
August
September
October
November
December
Essential Travel Info for San Jose
Currency
CRC
₡ Costa Rican colón
Language
Spanish
Driving
Right side
Connect
Cable TV channels have many American Eng...
Safety
High Safety
GPI: 1.732
Best Time to Visit San Jose
Location, climate overview & historical trends
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📍 9.9280° N, 84.0900° W
Open in Google MapsSan Jose is a prominent destination in Costa Rica.
Located at 9.93°N latitude,San Jose experiences a tropical climate with warm temperatures year-round.
Based on 30 years of data, March is the warmest month (avg. 27°C), while December is the coolest. September sees the most rain (88% chance), making February the driest month.
Historical Climate Trend
30-Year Analysis+1.3°C
Total over 30 years
+0.43°C
Per decade
Linear regression analysis of historical maximum temperatures for San Jose, based on 1995-2024 satellite data from NASA POWER.
Best Time to Visit
NASA POWER Data (1991-2021)January, February, March
Best months to visit
25°C
Avg High
Based on 30 years of NASA satellite data,San Jose receives approximately 2,176mm of rainfall annually. These months offer optimal temperatures and minimal rain probability for your visit.
Climate Trends
EXCLUSIVE1995-2040 Temperature Trend
1995 Avg
24.5°
2024 Avg
25.6°
2040 Proj
26°
+0.43°C
per decade (observed)
+0.28°C
per decade (CMIP6)
🌡️ San Jose has warmed by +1.3°C since 1995. By 2040, an additional +0.4°C is projected (based on CMIP6 rate of 0.275°C/decade), for a total of +1.7°C from 1995 baseline.
NASA POWER (1995-2024) + CMIP6 (CMCC_CM2_VHR4, EC_Earth3P_HR, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, NICAM16_8S)
Travel Intelligence
Exclusive flight analytics & health data for San Jose
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Flight Connectivity Analysis
Airport traffic data & seasonal patterns
Balanced traffic
0
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Peak
Nov
Low
Oct
Monthly Traffic Distribution
Key Connections
Health & Safety Advisory
CDC travel health recommendations
COVID-19
All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.
Chikungunya
All travelers should take steps to prevent mosquito bites. Chikungunya vaccination is generally not recommended. Travelers who wish to consider vaccination can visit “What to consider before traveling” on thechikungunya vaccinespage to learn more.
Hepatitis A
Recommended for unvaccinated travelers one year old or older going to Costa Rica.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.
Hepatitis B
Recommended for unvaccinated travelers younger than 60 years old traveling to Costa Rica. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Costa Rica.
Malaria
CDC recommends that travelers going to certain areas of Costa Rica take prescription medicine to prevent malaria. Depending on the medicine you take, you will need to start taking this medicine multiple days before your trip, as well as during and after your trip. Talk to your doctor about which malaria medication you should take.Transmission areasPresent in the provinces of Alajuela and LimónRare to no transmission in other parts of the countryDrug resistanceNoneSpeciesP. falciparum(86%)P. vivax(14%)Recommended chemoprophylaxisAlajuela and Limón Provinces: Atovaquone-proguanil, chloroquine, doxycycline, mefloquine, tafenoquine2All other areas: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only)4Updated April 23, 2025See footnotes
Measles
Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.
+3 more
Source: CDC Travelers' Health
View Complete Health GuideSan Jose Climate Data by Month
Historical temperature and precipitation averages
| Month | Avg High (°C) | Rain Probability (%) | Status |
|---|---|---|---|
| January | 25°C | 11% | ✨ Perfect |
| February | 26°C | 7% | ✨ Perfect |
| March | 27°C | 10% | ✨ Perfect |
| April | 26°C | 25% | 😊 Pleasant |
| May | 25°C | 68% | 🌧️ Rainy |
| June | 24°C | 82% | 🌧️ Rainy |
| July | 25°C | 62% | 🌧️ Rainy |
| August | 25°C | 73% | 🌧️ Rainy |
| September | 25°C | 88% | 🌧️ Rainy |
| October | 24°C | 86% | 🌧️ Rainy |
| November | 24°C | 60% | 🌧️ Rainy |
| December | 24°C | 22% | ✨ Perfect |
Weather in Cities Near San Jose
Explore climate data for popular destinations within easy reach
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Honduras
Compare weather conditions with nearby destinations for your trip planning
Compare San Jose Weather vs Popular Destinations
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These destinations share similar weather patterns with San Jose. Perfect alternatives if you're looking for the same climate in a different location.
San Jose Weather FAQ
When is the best time to visit San Jose?
Honestly, look for months with mild temperatures (20°C-25°C) and low rain chance. Based on historical data, January, February, March are usually great choices.
When is the hottest month in San Jose?
March is historically the hottest month in San Jose with average highs of 27°C.
When does it rain the most in San Jose?
September typically sees the highest probability of rain (88%).
Is San Jose expensive?
Prices vary by season. The "Perfect" weather months usually coincide with peak tourist season and higher prices, while the rainy or cold months offer better deals.