Climate Ono-i-Lau Airport 2020-2024

Climate and trends: average temperature, flight conditions, precipitation, wind speed and direction.

Calculated from historical METAR data of Fua'amotu International Airport (NFTF) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	90.9	84	96	95	90	89
February	87.9	94	94	88	87	91
March	89.7	81	94	84	97	91
April	92.1	97	94	93	92	90
May	92.1		90	94	90	97
June	93.5		95	93	97	91
July	90.7		91	87	89	92
August	89.8		81	98	89	91
September	89.5		91	94	86	84
October	90.6		96	91	95	86
November	93.7		86	94	96	98
December	90.3		90	93	94	88
Average	90.7	88.6	91.5	91.9	91.9	90.5

3rd best VFR conditions of Tonga

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km or more and a ceiling of 3,000 ft or more. Only observations between sunrise and sunset are taken into account.

Marginal VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	98.6	98	100	98	97	99
February	97.0	100	97	97	98	99
March	97.1	100	97	87	100	98
April	97.0	99	97	100	95	94
May	98.5		99	99	98	99
June	98.6		99	99	100	98
July	97.3		99	100	95	97
August	97.9		98	100	96	96
September	96.8		99	100	94	93
October	98.6		100	99	98	96
November	99.0		98	100	100	100
December	98.2		100	98	99	98
Average	98.0	99.1	98.5	97.9	97.6	97.3

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	29.7	30	30	30	30	30
February	29.9	30	30	30	29	30
March	29.2	29	29	29	29	29
April	28.6	29	29	29	28	28
May	27.0		27	27	27	27
June	25.9		25	27	25	26
July	25.3		25	26	26	25
August	25.1		24	26	24	26
September	25.8		26	27	26	25
October	26.5		26	27	27	26
November	27.8		28	28	29	28
December	29.3		30	29	30	30
Average	27.7	29.4	27.3	27.8	27.4	27.3

3rd highest temperature of Tonga

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	23.7	25	25	24	24	23
February	23.7	24	25	22	22	24
March	23.2	24	23	23	23	24
April	22.6	23	23	23	21	22
May	21.6		23	22	21	21
June	20.4		18	22	20	21
July	19.7		18	22	21	20
August	19.5		19	21	19	20
September	19.6		19	20	20	20
October	21.1		20	21	21	22
November	21.6		22	22	22	22
December	23.1		24	24	24	24
Average	21.9	24.0	21.4	21.8	21.4	21.8

1st lowest temperature of Tonga

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	9.5	13	11	12	15	7
February	11.0	6	14	21	11	5
March	14.2	25	12	15	12	15
April	8.5	2	8	13	10	14
May	7.6		10	3	18	3
June	6.7		7	8	7	10
July	8.4		8	1	9	13
August	8.5		13	4	10	8
September	6.9		2	1	15	10
October	8.0		0	13	7	17
November	6.3		13	11	1	3
December	8.1		5	13	6	10
Average	9.0	11.8	8.4	9.6	9.8	9.5

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 (knots)

Month	Average	2024	2023	2022	2021	2020
January	6.3	9	6	8	9	7
February	7.0	10	7	6	7	7
March	6.0	7	8	6	7	7
April	7.0	8	10	6	6	8
May	7.1		9	7	8	6
June	6.5		6	7	6	8
July	7.0		7	8	7	8
August	7.5		9	8	8	7
September	7.7		12	7	7	9
October	8.1		11	9	8	9
November	7.1		9	7	6	7
December	7.1		10	7	7	8
Average	7.1	8.5	8.7	7.0	7.3	7.6

3rd highest wind speed of Tonga

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	076°	036°	047°	012°	119°
February	102°	015°	058°	071°	108°
March	085°	102°	349°	070°	098°
April	094°	088°	102°	144°	107°
May		093°	129°	111°	090°
June		217°	099°	105°	112°
July		131°	093°	102°	115°
August		115°	104°	144°	084°
September		094°	088°	108°	122°
October		104°	106°	102°	106°
November		089°	070°	099°	091°
December		100°	072°	083°	092°

Prevailing wind direction

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