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Monthly climate in San Juan, Loreto, Peru

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification San Juan features a tropical rainforest climate (Af).Temperatures typically range between 25 °C (78 °F) and 26 °C (80 °F) through the year, but rarely can drop to 17 °C (63 °F) or can rise to as high as 36 °C (96 °F).The average annual precipitation amounts to about 2615 mm (103.0 inches) and receives 277 rainy days on the 1 mm (0.04 inches) threshold annually.San Juan enjoys an average of 3076 hours of sunshine throughout the year, and daylight varies from 11 hours 53 minutes to 12 hours 19 minutes per day.

Monthly average temperatures in San Juan, Loreto, Peru §

The warmest months in San Juan are September, October and November, with daily mean temperatures ranging from 26 to 26 °C (80 - 80 °F) throughout the day. The coldest temperatures usually occur in May, June and July, when daily mean temperatures range from 25 to 26 °C (78 - 79 °F) throughout the day. On average each year, San Juan experiences 327 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in San Juan, Loreto, Peru.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 35°C
(95°F)		 34°C
(93°F)		 36°C
(96°F)		 35°C
(95°F)		 34°C
(93°F)		 33°C
(92°F)		 33°C
(92°F)		 35°C
(95°F)		 35°C
(96°F)		 36°C
(96°F)		 34°C
(93°F)		 34°C
(94°F)
Mean maximum 33°C
(92°F)		 33°C
(92°F)		 34°C
(93°F)		 34°C
(93°F)		 33°C
(92°F)		 32°C
(90°F)		 33°C
(91°F)		 34°C
(93°F)		 35°C
(95°F)		 35°C
(94°F)		 34°C
(93°F)		 33°C
(92°F)
Average high 30°C
(86°F)		 30°C
(87°F)		 30°C
(86°F)		 30°C
(86°F)		 30°C
(85°F)		 29°C
(85°F)		 30°C
(86°F)		 31°C
(88°F)		 31°C
(89°F)		 31°C
(88°F)		 30°C
(87°F)		 30°C
(86°F)
Daily mean 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(78°F)		 25°C
(78°F)		 26°C
(79°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(79°F)
Average low 23°C
(74°F)		 24°C
(75°F)		 24°C
(75°F)		 23°C
(75°F)		 23°C
(74°F)		 23°C
(73°F)		 22°C
(72°F)		 22°C
(72°F)		 23°C
(74°F)		 23°C
(75°F)		 24°C
(75°F)		 24°C
(75°F)
Mean minimum 22°C
(72°F)		 22°C
(73°F)		 23°C
(73°F)		 22°C
(72°F)		 22°C
(71°F)		 22°C
(71°F)		 19°C
(66°F)		 19°C
(66°F)		 22°C
(71°F)		 22°C
(72°F)		 22°C
(72°F)		 23°C
(73°F)
Minimum 21°C
(71°F)		 22°C
(71°F)		 22°C
(72°F)		 21°C
(71°F)		 20°C
(68°F)		 20°C
(69°F)		 17°C
(63°F)		 17°C
(63°F)		 20°C
(68°F)		 21°C
(71°F)		 22°C
(71°F)		 22°C
(72°F)

Compare climate in San Juan with other places

Compare temperature, precipitation, sunshine, UV index in San Juan, Loreto, Peru with other places around the world.

Monthly average precipitation in San Juan, Loreto, Peru §

San Juan usually has the most precipitation in March, April and December, with an average of 27 rainy days and 300 mm (11.8 inches) of precipitation per month.The driest months in San Juan are July, August and September. On average, 134 mm (5.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Juan, Loreto, Peru.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 251 (9.9) 226 (8.9) 321 (12.7) 305 (12.0) 223 (8.8) 193 (7.6) 145 (5.7) 107 (4.2) 152 (6.0) 188 (7.4) 233 (9.2) 273 (10.7)
Average precipitation days (≥ 1 mm) 23 25 28 26 24 24 18 15 20 22 25 27

Monthly sunshine hours in San Juan, Loreto, Peru §

The sunniest months in San Juan are July, August and September, when the sun shines an average of 9 hours 38 minutes a day.Least sunny months in San Juan: January, February and April receive an average of 7 hours 33 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Juan, Loreto, Peru.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 219 231 234 230 252 265 297 300 289 269 231 256
Mean daily daylight hours 12h 18m 12h 12m 12h 6m 12h 0m 11h 55m 11h 53m 11h 54m 11h 58m 12h 4m 12h 10m 12h 16m 12h 19m

Solar UV radiation in San Juan, Loreto, Peru §

San Juan experiences the highest level of ultraviolet (UV) radiation in February, March and April, when the maximum UV index can reach values of 16 - 17, which corresponds to the Extreme category of sun exposure.June, July and August are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 12. For more detailed information, check out our hourly San Juan UV Index data.

Average daily maximum UV levels by month for San Juan, Loreto, Peru.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 15 16 17 16 13 12 11 12 13 14 13 13