Climate Nan-Gang Police District Helipad 2020-2024

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

Calculated from historical METAR data of Taipei Songshan Airport (RCSS) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	63.4	60	69	55	74	59
February	58.8	59	56	44	78	76
March	65.9	62	65	67	63	72
April	71.7		66	69	68	68
May	74.3		74	52	83	74
June	81.3		75	80	87	95
July	92.1		91	90	90	94
August	88.4		76	91	91	91
September	81.6		88	65	96	83
October	72.5		75	52	79	75
November	74.9		87	74	72	80
December	59.8		58	32	74	51
Average	72.8	60.0	73.7	65.9	79.6	76.7

4th best VFR conditions of Taiwan

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	97.4	96	100	99	98	96
February	94.5	99	92	91	99	99
March	94.9	95	98	92	93	97
April	97.8		96	98	97	99
May	94.7		98	88	97	92
June	94.5		92	94	97	99
July	97.8		97	96	97	98
August	96.4		91	98	97	96
September	94.8		97	87	97	97
October	95.5		96	86	96	99
November	97.8		100	96	99	99
December	95.5		94	93	96	96
Average	96.1	96.6	95.8	93.0	96.8	97.1

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	20.4	20	20	20	20	21
February	21.3	23	21	19	24	23
March	23.9	23	24	25	25	25
April	26.8		27	26	26	24
May	30.3		30	27	33	31
June	33.4		33	33	34	35
July	35.5		35	36	36	36
August	34.8		35	36	34	35
September	32.5		34	31	34	32
October	27.9		29	27	28	28
November	25.7		26	27	24	26
December	21.3		22	20	22	20
Average	27.1	22.0	28.0	27.4	28.4	28.1

4th highest temperature of Taiwan

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	14.8	14	14	16	14	15
February	14.9	15	15	15	16	16
March	17.0	16	17	18	18	18
April	19.8		20	19	20	18
May	23.6		23	21	26	24
June	26.2		26	25	27	28
July	27.5		28	27	28	28
August	27.2		27	27	27	27
September	25.4		26	24	26	25
October	22.5		23	22	24	23
November	20.1		19	21	19	21
December	16.3		16	16	16	16
Average	20.5	14.8	21.0	21.1	21.6	21.6

3rd lowest temperature of Taiwan

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	21.5	22	19	29	20	14
February	22.8	11	22	52	15	11
March	17.4	23	15	19	14	16
April	15.4		19	18	12	17
May	21.1		21	44	10	24
June	19.2		23	25	14	8
July	9.5		15	6	15	4
August	12.7		20	8	14	11
September	22.1		16	39	6	18
October	33.6		31	59	28	40
November	26.8		20	33	24	30
December	40.2		38	60	29	66
Average	20.9	18.6	21.1	31.2	16.5	21.3

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	9.2	8	9	10	9	8
February	8.4	9	9	8	9	8
March	8.5	8	9	9	8	8
April	8.2		8	8	10	9
May	8.1		9	8	8	7
June	7.7		7	7	10	8
July	8.0		9	7	8	7
August	8.2		9	7	7	9
September	8.5		10	9	10	7
October	10.5		11	10	13	11
November	10.1		10	10	10	11
December	9.3		8	9	9	10
Average	8.7	8.3	8.8	8.5	9.1	8.6

4th highest wind speed of Taiwan

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	082°	080°	086°	087°	083°
February	086°	076°	086°	078°	082°
March	076°	074°	082°	076°	082°
April		079°	077°	084°	082°
May		072°	084°	021°	067°
June		337°	306°	264°	274°
July		083°	300°	031°	293°
August		288°	061°	075°	090°
September		080°	032°	086°	072°
October		081°	082°	086°	082°
November		081°	083°	085°	084°
December		084°	089°	083°	090°

Prevailing wind direction

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