, with a very mild winter (but with the possibility of short cold spells) and a very hot, muggy summer.
, near the Mexican border, and 50 km (30 mi) away from the coast.
We are on the 26th parallel, not far from the Tropic, and indeed the hot season is very long.
of the coldest month (January) is of 16 °C (61 °F), that of the warmest month (August) is of 30.1 °C (86 °F).
amounts to 610 millimeters (24 inches) per year. We are in the westernmost part, the driest of the Texan coast.
, from December to February, is very mild.
The sun shines quite often, although there are periods characterized by clouds, rain and wind.
There may be warm periods even in the middle of winter, with highs around 25 °C (77 °F) and more, sometimes even 30 °C (86 °F).
, with highs below 10 °C (50 °F). Very rarely, as happened on Christmas 2004, in December 2017 and in February 2021, it can even
. In recent decades, the record is -8 °C (17.5 °F), recorded in December 1989. In February 2021, the temperature reached -5.5 °C (22 °F).
, from June to September, is very hot and sunny, with some thunderstorms. There combination of humidity and temperature makes the heat sweltering.
There can be long, very hot periods even in May and October, and sometimes in late April, while for short periods, the temperature can reach about 40 °C (104 °F) from March to September. The record is 42 °C (107.5 °F), last recorded in early September 2000.
From June to November (but with a higher probability from August to October), there is the risk of
. The city was hit hard by Hurricane Dolly in late July 2008.
temperature ranges between 20 °C (68 °F) and 29 °C (84 °F). From January to March, the sea is very cool, while it becomes pleasantly warm for swimming from June to October.
The best time to visit Harlingen is from November to March. Winter, from December to February, is generally a mild season, although it can sometimes get cold (especially in December and January). You can therefore choose the months of March and November.
. Here are the average temperatures.
January, the coldest month of the year, is generally a very mild month. The average temperature is of
16 °C, with a minimum of
9.9 °C and a maximum of
22.1 °C.
On the coldest nights of the month, the temperature usually drops to around
1.5 °C. However, it dropped to
-4 °C in January 2010.
On the warmest days of the month, the temperature usually reaches around
29.5 °C. However, it reached
34.4 °C in January 2002.
Precipitation amounts to
25 mm, distributed over 8 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
18.4 kph.
The average sea temperature is of
20.6 °C. Therefore, the sea is cool for swimming.
February is generally a warm month. The average temperature is of
18.3 °C, with a minimum of
12.2 °C and a maximum of
24.4 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C. However, it dropped to
-3 °C in February 2011.
On the warmest days of the month, the temperature usually reaches around
31.5 °C. However, it reached
35.6 °C in February 2017.
Precipitation amounts to
20 mm, distributed over 6 days.
The day lasts on average 11 hours and 20 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
19.9 kph.
The average sea temperature is of
19.8 °C. Therefore, the sea is very cool for swimming.
March is generally a warm month. The average temperature is of
21.2 °C, with a minimum of
15.2 °C and a maximum of
27.2 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C. However, it dropped to
-2.3 °C in March 1996.
On the warmest days of the month, the temperature usually reaches around
34 °C. However, it reached
38.3 °C in March 2009.
Precipitation amounts to
35 mm, distributed over 6 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
20.9 kph.
The average sea temperature is of
20.2 °C. Therefore, the sea is very cool for swimming.
April is generally a warm to hot, muggy month. The average temperature is of
24.4 °C, with a minimum of
18.4 °C and a maximum of
30.3 °C.
On the coldest nights of the month, the temperature usually drops to around
9.5 °C. However, it dropped to
5 °C in April 2007.
On the warmest days of the month, the temperature usually reaches around
35.5 °C. However, it reached
40 °C in April 2017.
Precipitation amounts to
35 mm, distributed over 5 days.
The day lasts on average 12 hours and 50 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
21.2 kph.
The average sea temperature is of
22.2 °C. Therefore, the sea is cool for swimming.
May is generally a warm to hot, muggy month. The average temperature is of
27.3 °C, with a minimum of
21.7 °C and a maximum of
33 °C.
On the coldest nights of the month, the temperature usually drops to around
15 °C. However, it dropped to
10 °C in May 2004.
On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
39.4 °C in May 1999.
Precipitation amounts to
65 mm, distributed over 6 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
20.5 kph.
The average sea temperature is of
25.2 °C. Therefore, the sea is warm enough for swimming.
June is generally a very hot, muggy month. The average temperature is of
29.3 °C, with a minimum of
23.7 °C and a maximum of
35 °C.
On the coldest nights of the month, the temperature usually drops to around
20.5 °C. However, it dropped to
16 °C in June 1997.
On the warmest days of the month, the temperature usually reaches around
37.5 °C. However, it reached
41.7 °C in June 2019.
Precipitation amounts to
55 mm, distributed over 6 days.
The day lasts on average 13 hours and 50 minutes. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 10 hours of sunshine per day. So, the sun shines 74% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
18.5 kph.
The average sea temperature is of
27.8 °C. Therefore, the sea is pleasantly warm and allows long swims.
July is generally a very hot month. The average temperature is of
29.9 °C, with a minimum of
24.1 °C and a maximum of
35.7 °C.
On the coldest nights of the month, the temperature usually drops to around
21.5 °C. However, it dropped to
18.8 °C in July 1993.
On the warmest days of the month, the temperature usually reaches around
38.5 °C. However, it reached
40 °C in July 2003.
Precipitation amounts to
45 mm, distributed over 6 days.
The day lasts on average 13 hours and 35 minutes.
There are on average 11 hours of sunshine per day. So, the sun shines 80% of the time.
The average humidity is 70%.
The average wind speed is of
18.9 kph.
The average sea temperature is of
28.4 °C. Therefore, the sea is pleasantly warm and allows long swims.
August, the hottest month of the year, is generally a very hot month. The average temperature is of
30.1 °C, with a minimum of
24.1 °C and a maximum of
36.2 °C.
On the coldest nights of the month, the temperature usually drops to around
22 °C. However, it dropped to
20 °C in August 1999.
On the warmest days of the month, the temperature usually reaches around
38.5 °C. However, it reached
41.1 °C in August 2011.
Precipitation amounts to
50 mm, distributed over 5 days.
The day lasts on average 13 hours and 0 minutes.
There are on average 10 hours of sunshine per day. So, the sun shines 77% of the time.
The average humidity is 69%.
The average wind speed is of
16.8 kph.
The average sea temperature is of
28.8 °C. Therefore, the sea is pleasantly warm and allows long swims.
September is generally a very hot, muggy month. The average temperature is of
28 °C, with a minimum of
22.5 °C and a maximum of
33.4 °C.
On the coldest nights of the month, the temperature usually drops to around
17.5 °C. However, it dropped to
11.7 °C in September 2000.
On the warmest days of the month, the temperature usually reaches around
37 °C. However, it reached
42 °C in September 2000.
Precipitation amounts to
135 mm, distributed over 11 days.
The day lasts on average 12 hours and 20 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
14.1 kph.
The average sea temperature is of
28.8 °C. Therefore, the sea is pleasantly warm and allows long swims.
October is generally a warm to hot, muggy month. The average temperature is of
24.8 °C, with a minimum of
18.7 °C and a maximum of
30.9 °C.
On the coldest nights of the month, the temperature usually drops to around
9.5 °C. However, it dropped to
-0.6 °C in October 1993.
On the warmest days of the month, the temperature usually reaches around
35 °C. However, it reached
38.3 °C in October 2012.
Precipitation amounts to
70 mm, distributed over 9 days.
The day lasts on average 11 hours and 30 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 65% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
15.6 kph.
The average sea temperature is of
27.1 °C. Therefore, the sea is pleasantly warm and allows long swims.
November is generally a warm month. The average temperature is of
20.2 °C, with a minimum of
14.1 °C and a maximum of
26.3 °C.
On the coldest nights of the month, the temperature usually drops to around
4.5 °C. However, it dropped to
-0.6 °C in November 2018.
On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
38.9 °C in November 2013.
Precipitation amounts to
45 mm, distributed over 8 days.
The day lasts on average 10 hours and 50 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
16.8 kph.
The average sea temperature is of
24.4 °C. Therefore, the sea is warm enough for swimming.
December is generally a very mild month. The average temperature is of
16.9 °C, with a minimum of
10.9 °C and a maximum of
22.9 °C.
On the coldest nights of the month, the temperature usually drops to around
1.5 °C. However, it dropped to
-4 °C in December 1996.
On the warmest days of the month, the temperature usually reaches around
30 °C. However, it reached
33 °C in December 1996.
Precipitation amounts to
30 mm, distributed over 8 days.
The day lasts on average 10 hours and 30 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 4.5 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
17.5 kph.
The average sea temperature is of
22.1 °C. Therefore, the sea is cool for swimming.