Weather in Alajuela

Calculated from weather data of Juan Santamaría International Airport (MROC) between 2020 and 2024.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	27.9	29.1	27.5	28.0	27.8	28.1
February	28.6	28.8	28.0	28.1	28.8	29.1
March	29.3	30.8	28.3	29.3	29.0	29.6
April	29.3	30.3	29.1	28.3	28.1	29.8
May	27.9		29.6	27.0	27.6	28.1
June	27.3		28.3	25.5	27.1	27.3
July	27.6		28.6	26.8	27.1	28.0
August	27.4		28.3	27.0	26.5	27.1
September	27.2		28.6	27.3	27.0	27.0
October	26.2		26.6	26.1	26.8	26.3
November	26.6		27.3	25.8	27.1	25.3
December	27.4		28.1	26.6	27.8	26.8
Average	27.9	29.8	28.2	27.2	27.5	27.7

3rd highest temperature of Costa Rica

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	19.3	20	19	19	19	20
February	19.2	20	20	19	19	20
March	19.5	20	19	20	19	20
April	19.9	21	20	20	20	20
May	19.8		21	19	20	20
June	19.3		20	18	19	19
July	19.6		20	19	20	20
August	19.5		21	19	19	20
September	18.7		20	18	18	19
October	19.0		20	19	19	19
November	19.1		19	18	19	19
December	19.5		20	19	20	19
Average	19.4	20.3	19.7	18.8	19.3	19.5

2nd lowest temperature of Costa Rica

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
30 °C or warmer	43	25	5	3	28
25 °C or warmer	120	347	298	332	331
20 °C or warmer	121	365	353	365	366
0 °C or colder	0	0	0	0	0

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	0.9	1	1	0	1	2
February	0.4	1	0	0	1	0
March	1.6	0	6	3	1	0
April	5.6	5	1	11	10	7
May	11.2		7	15	9	9
June	10.9		12	16	8	14
July	10.7		9	14	13	9
August	9.1		11	9	11	9
September	11.5		11	13	10	12
October	14.0		18	14	9	15
November	10.6		12	14	6	17
December	2.1		2	0	1	4
Average	6.8	1.7	7.7	9.5	6.6	8.0

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (km/h)

Month	Average	2024	2023	2022	2021	2020
January	23.9	24	22	23	23	24
February	25.8	24	30	26	22	28
March	23.6	20	19	22	23	26
April	18.1	20	20	15	17	18
May	13.5		17	11	14	14
June	12.8		14	11	12	12
July	15.3		16	13	16	15
August	13.9		14	12	13	14
September	12.6		14	11	12	13
October	11.9		11	12	13	12
November	14.4		13	12	17	13
December	21.2		21	21	21	20
Average	17.8	21.9	17.6	15.4	16.8	17.4

2nd highest wind speed of Costa Rica

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	E	E	E	E	E
February	E	E	E	E	E
March	E	E	E	E	E
April	E	SE	SE	SE	SE
May		E	SW	SE	SE
June		S	SW	S	SW
July		E	SE	E	SE
August		SE	SW	S	S
September		S	SW	SW	SW
October		SW	SW	SW	SW
November		S	SW	E	SW
December		E	E	E	E

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Alajuela weather Q&A

What is the warmest month in Alajuela?

The warmest month is April with an average temperature of 29 °C over the past years.

What is the coldest month in Alajuela?

The coldest month is October with an average daytime temperature of 26 °C in the past few years.

Which month is the wettest in Alajuela?

Chance of precipitation is the highest in October with a probability of around 14.1 %.

Which month is the driest in Alajuela?

The least rainfall and snow can be expected in February. The probability is about 0.4 %.