Weather in Saint Mary Parish

Calculated from weather data of Harry P Williams Memorial Airport (KPTN) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	64.0	62.0	68.0	62.0	63.0	66.0
February	69.0	69.0	70.0	67.0	62.0	67.0
March	73.0	73.0	72.0	74.0	73.0	78.0
April	76.0		70.0	78.0	75.0	79.0
May	79.0		53.0	85.0	81.0	83.0
June	84.0		90.0	64.0	86.0	87.0
July	81.0		92.0	32.0	89.0	89.0
August	82.0		95.0	32.0	89.0	91.0
September	79.0		90.0	32.0	85.0	85.0
October	77.0		80.0	73.0	67.0	80.0
November	71.0		70.0	71.0	68.0	75.0
December	67.0		66.0	70.0	74.0	65.0
Average	74.0	68.0	76.0	61.0	76.0	79.0

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	45.0	42	41	42	46	51
February	51.0	51	38	47	44	51
March	54.0	57	33	52	58	64
April	56.0		32	62	60	61
May	64.0		40	71	68	67
June	71.0		75	54	75	73
July	69.0		76	32	74	76
August	67.0		76	32	75	75
September	66.0		73	32	71	72
October	58.0		61	44	49	63
November	50.0		51	44	48	56
December	48.0		48	39	57	45
Average	57.0	50.0	54.0	45.0	60.0	63.0

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
86 °F or warmer	0	125	24	82	98
77 °F or warmer	7	176	97	210	222
68 °F or warmer	49	270	176	283	306
32 °F or colder	4	1	7	5	2

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	4.2	6	0	5	3	6
February	12.2	8	57	6	4	3
March	7.5	2	44	2	3	0
April	1.7		2	0	2	1
May	1.9		0	3	4	1
June	4.3		2	2	5	7
July	4.7		1	8	4	6
August	5.8		0	12	2	0
September	4.3		1	4	5	9
October	3.2		3	0	1	3
November	3.5		9	1	2	5
December	6.0		6	0	3	2
Average	5.0	5.1	10.0	3.8	3.2	3.5

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 (miles per hour)

Month	Average	2024	2023	2022	2021	2020
January	9.4	9	8	10	10	10
February	9.8	10	8	9	10	11
March	9.4	9	6	11	10	10
April	9.0		3	11	10	10
May	7.6		2	9	9	9
June	7.6		8	6	8	8
July	6.1		7	4	5	8
August	5.9		7	4	6	7
September	6.0		6	4	6	8
October	7.0		9	6	3	9
November	7.7		8	8	6	8
December	8.2		8	7	9	8
Average	8.0	9.3	6.6	7.1	7.5	8.8

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	NE	SE	N	W	E
February	S	S	E	NE	S
March	E	E	S	SE	S
April		NE	SE	E	SE
May		NE	S	SE	SE
June		SW	SW	S	SE
July		SW	SW	SW	SW
August		SW	SE	E	W
September		NE	NE	E	NE
October		NE	E	E	NE
November		NE	NE	NE	NE
December		NE	E	S	E

Prevailing wind direction

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

Saint Mary Parish weather Q&A

What is the warmest month in Saint Mary Parish?

The warmest month is June with an average temperature of 84 °F over the past years.

What is the coldest month in Saint Mary Parish?

The coldest month is January with an average daytime temperature of 64 °F in the past few years.

Which month is the wettest in Saint Mary Parish?

Chance of precipitation is the highest in February with a probability of around 12.3 %.

Which month is the driest in Saint Mary Parish?

The least rainfall and snow can be expected in April. The probability is about 1.8 %.