Daylight hours in Curitiba
Curitiba gets 13h 43m of daylight on its longest day in December, and 10h 34m on its shortest in June — a difference of 3h 09m across the year.
How fast the days change
Around 17 March, Curitiba gains or loses about 1.5 minutes of daylight every day.
Barely perceptible — near the equator the length of the day hardly changes at all, and the seasons announce themselves through rain and heat instead.
Sunrise and sunset by month
On the 15th of each month, in America/Sao_Paulo local time, daylight saving included.
| Month | Sunrise | Sunset | Daylight | Solar noon |
|---|---|---|---|---|
| January | 05:40 | 19:12 | 13h 32m | 12:26 |
| February | 06:03 | 18:59 | 12h 56m | 12:31 |
| March | 06:18 | 18:33 | 12h 15m | 12:25 |
| April | 06:32 | 18:01 | 11h 29m | 12:17 |
| May | 06:47 | 17:39 | 10h 53m | 12:13 |
| June | 07:00 | 17:34 | 10h 34m | 12:17 |
| July | 07:02 | 17:44 | 10h 42m | 12:23 |
| August | 06:44 | 17:58 | 11h 14m | 12:21 |
| September | 06:14 | 18:10 | 11h 56m | 12:12 |
| October | 05:42 | 18:23 | 12h 41m | 12:02 |
| November | 05:20 | 18:42 | 13h 21m | 12:01 |
| December | 05:20 | 19:03 | 13h 43m | 12:12 |
Solstices and equinoxes
| Date | Sunrise | Sunset | Daylight | |
|---|---|---|---|---|
| March equinox | 20 Mar | 06:20 | 18:28 | 12h 07m |
| June solstice | 21 Jun | 07:02 | 17:35 | 10h 33m |
| September equinox | 22 Sep | 06:06 | 18:13 | 12h 07m |
| December solstice | 21 Dec | 05:23 | 19:06 | 13h 43m |
The equinoxes give almost exactly twelve hours of daylight everywhere on earth — "almost" because sunrise is defined by the sun's upper edge rather than its centre, and the atmosphere bends its light over the horizon before it has really arrived. Both lengthen the day by a few minutes.
Other cities in Brazil
Assumptions
- Sea-level horizon. Hills, mountains and buildings all delay sunrise and bring sunset forward, sometimes by a lot in a valley.
- Standard refraction. Sunrise is taken at −0.833°, allowing for the sun's disc and average atmospheric bending. Unusual air conditions shift it by a minute or two.
- Local clock time, with daylight saving applied from the IANA timezone database.