September history in Heraklion

Greece · Compare three complete years with the current year to date.

Month

Year

Mean air temperature

23°C

Mean daytime air temperature

25°C

Mean nighttime air temperature

21°C

Maximum air temperature

33°C

Minimum air temperature

15°C

Total precipitation

41.4 mm

Sunny days

Mean sea temperature

26.8°C

Minimum sea temperature

25.8°C

Maximum sea temperature

27.6°C

Maximum wind speed

30.8 km/h

Air temperature (°C)

Daily minimum, mean and maximum

Date	Mean (°C)	Maximum (°C)	Minimum (°C)
2026-09-01	25	29	22
2026-09-02	24	30	19
2026-09-03	25	30	18
2026-09-04	26	29	24
2026-09-05	26	29	24
2026-09-06	25	30	18
2026-09-07	26	31	22
2026-09-08	25	27	22
2026-09-09	23	27	21
2026-09-10	22	28	17
2026-09-11	22	28	17
2026-09-12	23	30	17
2026-09-13	24	33	18
2026-09-14	24	27	21
2026-09-15	22	26	19
2026-09-16	21	24	19
2026-09-17	22	24	20
2026-09-18	23	26	20
2026-09-19	23	27	19
2026-09-20	24	26	21
2026-09-21	24	27	22
2026-09-22	24	28	19
2026-09-23	21	24	20
2026-09-24	20	23	18
2026-09-25	20	24	16
2026-09-26	20	25	15
2026-09-27	19	22	18
2026-09-28	21	23	19
2026-09-29	21	23	19
2026-09-30	20	22	18

Sea temperature (°C)

Daily sea-surface mean

Date	Sea temperature (°C)
2026-09-01	27.4
2026-09-02	27.5
2026-09-03	27.4
2026-09-04	27.3
2026-09-05	27.2
2026-09-06	27.1
2026-09-07	27.2
2026-09-08	27.0
2026-09-09	27.0
2026-09-10	26.9
2026-09-11	26.9
2026-09-12	26.9
2026-09-13	26.9
2026-09-14	26.9
2026-09-15	26.8
2026-09-16	26.9
2026-09-17	26.8
2026-09-18	26.7
2026-09-19	26.6
2026-09-20	26.6
2026-09-21	26.4
2026-09-22	26.4
2026-09-23	26.4
2026-09-24	26.3
2026-09-25	26.2
2026-09-26	26.0
2026-09-27	25.9
2026-09-28	—
2026-09-29	—
2026-09-30	—

Wave height (m)

Daily mean wave height

Date	Wave height (m)
2026-09-01	0.5
2026-09-02	0.4
2026-09-03	0.7
2026-09-04	1.0
2026-09-05	1.1
2026-09-06	0.6
2026-09-07	0.6
2026-09-08	1.1
2026-09-09	0.9
2026-09-10	0.5
2026-09-11	0.4
2026-09-12	0.2
2026-09-13	0.2
2026-09-14	0.4
2026-09-15	0.4
2026-09-16	0.5
2026-09-17	0.8
2026-09-18	0.9
2026-09-19	0.5
2026-09-20	0.8
2026-09-21	0.9
2026-09-22	0.4
2026-09-23	0.5
2026-09-24	0.8
2026-09-25	0.5
2026-09-26	0.2
2026-09-27	0.4
2026-09-28	—
2026-09-29	—
2026-09-30	—

Precipitation (mm)

Daily precipitation total

Date	Precipitation (mm)
2026-09-01	0.0
2026-09-02	0.0
2026-09-03	0.0
2026-09-04	0.0
2026-09-05	0.0
2026-09-06	0.0
2026-09-07	0.0
2026-09-08	0.0
2026-09-09	0.0
2026-09-10	0.0
2026-09-11	0.0
2026-09-12	0.0
2026-09-13	0.0
2026-09-14	0.0
2026-09-15	0.1
2026-09-16	11.1
2026-09-17	9.1
2026-09-18	0.0
2026-09-19	0.0
2026-09-20	0.0
2026-09-21	0.0
2026-09-22	0.4
2026-09-23	2.7
2026-09-24	0.0
2026-09-25	0.0
2026-09-26	0.0
2026-09-27	4.7
2026-09-28	5.2
2026-09-29	3.0
2026-09-30	5.1

Sunshine duration (h)

WMO-defined direct sunshine hours

Date	Sunshine (h)
2026-09-01	12.2
2026-09-02	12.3
2026-09-03	12.1
2026-09-04	12.2
2026-09-05	12.1
2026-09-06	12.2
2026-09-07	12.1
2026-09-08	12.1
2026-09-09	12.0
2026-09-10	12.0
2026-09-11	11.9
2026-09-12	11.9
2026-09-13	11.9
2026-09-14	11.0
2026-09-15	7.1
2026-09-16	0.5
2026-09-17	10.2
2026-09-18	11.9
2026-09-19	11.8
2026-09-20	10.5
2026-09-21	11.4
2026-09-22	9.9
2026-09-23	7.2
2026-09-24	11.1
2026-09-25	11.5
2026-09-26	5.1
2026-09-27	5.8
2026-09-28	10.3
2026-09-29	10.4
2026-09-30	11.0

Humidity (%)

Daily mean relative humidity

Date	Humidity (%)
2026-09-01	65.0
2026-09-02	74.0
2026-09-03	61.0
2026-09-04	56.0
2026-09-05	56.0
2026-09-06	54.0
2026-09-07	55.0
2026-09-08	58.0
2026-09-09	58.0
2026-09-10	70.0
2026-09-11	79.0
2026-09-12	72.0
2026-09-13	68.0
2026-09-14	82.0
2026-09-15	79.0
2026-09-16	86.0
2026-09-17	75.0
2026-09-18	60.0
2026-09-19	62.0
2026-09-20	65.0
2026-09-21	60.0
2026-09-22	67.0
2026-09-23	84.0
2026-09-24	61.0
2026-09-25	61.0
2026-09-26	69.0
2026-09-27	81.0
2026-09-28	71.0
2026-09-29	65.0
2026-09-30	79.0

Wind (km/h)

Daily maximum wind speed

Date	Maximum wind (km/h)
2026-09-01	23.5
2026-09-02	19.2
2026-09-03	26.5
2026-09-04	29.1
2026-09-05	30.8
2026-09-06	20.2
2026-09-07	18.3
2026-09-08	30.4
2026-09-09	28.4
2026-09-10	19.0
2026-09-11	15.8
2026-09-12	14.4
2026-09-13	18.2
2026-09-14	13.8
2026-09-15	11.2
2026-09-16	13.0
2026-09-17	23.8
2026-09-18	22.6
2026-09-19	22.5
2026-09-20	26.3
2026-09-21	25.3
2026-09-22	16.2
2026-09-23	16.7
2026-09-24	17.1
2026-09-25	12.2
2026-09-26	13.1
2026-09-27	17.7
2026-09-28	25.0
2026-09-29	23.5
2026-09-30	20.8

Daily weather values

Source values for September 2026; unavailable readings are shown as gaps.

Date	Conditions	Min / max (°C)	Sea (°C)	Waves (m)	Rain (mm)	Sun (h)	Humidity (%)	Wind (km/h)
2026-09-01	Mostly clear	22 / 29	27.4	0.5	0.0	12.2	65.0	23.5
2026-09-02	Mostly clear	19 / 30	27.5	0.4	0.0	12.3	74.0	19.2
2026-09-03	Clear sky	18 / 30	27.4	0.7	0.0	12.1	61.0	26.5
2026-09-04	Mostly clear	24 / 29	27.3	1.0	0.0	12.2	56.0	29.1
2026-09-05	Mostly clear	24 / 29	27.2	1.1	0.0	12.1	56.0	30.8
2026-09-06	Clear sky	18 / 30	27.1	0.6	0.0	12.2	54.0	20.2
2026-09-07	Clear sky	22 / 31	27.2	0.6	0.0	12.1	55.0	18.3
2026-09-08	Mostly clear	22 / 27	27.0	1.1	0.0	12.1	58.0	30.4
2026-09-09	Mostly clear	21 / 27	27.0	0.9	0.0	12.0	58.0	28.4
2026-09-10	Mostly clear	17 / 28	26.9	0.5	0.0	12.0	70.0	19.0
2026-09-11	Foggy	17 / 28	26.9	0.4	0.0	11.9	79.0	15.8
2026-09-12	Foggy	17 / 30	26.9	0.2	0.0	11.9	72.0	14.4
2026-09-13	Foggy	18 / 33	26.9	0.2	0.0	11.9	68.0	18.2
2026-09-14	Foggy	21 / 27	26.9	0.4	0.0	11.0	82.0	13.8
2026-09-15	Foggy	19 / 26	26.8	0.4	0.1	7.1	79.0	11.2
2026-09-16	Thunderstorm	19 / 24	26.9	0.5	11.1	0.5	86.0	13.0
2026-09-17	Thunderstorm	20 / 24	26.8	0.8	9.1	10.2	75.0	23.8
2026-09-18	Partly cloudy	20 / 26	26.7	0.9	0.0	11.9	60.0	22.6
2026-09-19	Overcast	19 / 27	26.6	0.5	0.0	11.8	62.0	22.5
2026-09-20	Overcast	21 / 26	26.6	0.8	0.0	10.5	65.0	26.3
2026-09-21	Overcast	22 / 27	26.4	0.9	0.0	11.4	60.0	25.3
2026-09-22	Overcast	19 / 28	26.4	0.4	0.4	9.9	67.0	16.2
2026-09-23	Rain showers	20 / 24	26.4	0.5	2.7	7.2	84.0	16.7
2026-09-24	Overcast	18 / 23	26.3	0.8	0.0	11.1	61.0	17.1
2026-09-25	Overcast	16 / 24	26.2	0.5	0.0	11.5	61.0	12.2
2026-09-26	Overcast	15 / 25	26.0	0.2	0.0	5.1	69.0	13.1
2026-09-27	Thunderstorm	18 / 22	25.9	0.4	4.7	5.8	81.0	17.7
2026-09-28	Rain showers	19 / 23	—	—	5.2	10.3	71.0	25.0
2026-09-29	Rain showers	19 / 23	—	—	3.0	10.4	65.0	23.5
2026-09-30	Thunderstorm	18 / 22	—	—	5.1	11.0	79.0	20.8