Isiolo County · Kenya · 0.35° N · 37.58° E
Solar position in Isiolo
Sun position, daylight and the best solar panel angle for Isiolo — computed for 0.35° N, 37.58° E, 1095 m above sea level.
The sun right now
Sun in Isiolo today
Saturday, 24 October 2026 · local time UTC+3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:00 | sun 18° below horizon |
| Nautical dawn | 05:25 | 12° below |
| Civil dawn | 05:49 | 6° below |
| Sunrise | 06:10 | 102° ESE |
| Golden hour ends | 06:38 | sun 6° up |
| Solar noon | 12:13 | 77.8° high |
| Golden hour starts | 17:49 | sun 6° up |
| Sunset | 18:16 | 258° WSW |
| Civil dusk | 18:38 | 6° below |
| Nautical dusk | 19:02 | 12° below |
| Astronomical dusk | 19:27 | 18° below |
| Day length | 12 h 06 min | |
Sun path diagram for Isiolo
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 66.9° at solar noon in Isiolo; on the December solstice only 66.2°. Sunrise swings from 67° ENE in June to 113° ESE in December — a 47° arc along the horizon.
Sunrise, sunset and sun height by month
Values for the 21st of each month, local clock time including daylight saving time.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 06:37 | 12:40 | 18:44 | 12 h 06 min | 69.8° |
| February | 06:40 | 12:43 | 18:46 | 12 h 06 min | 79.2° |
| March | 06:33 | 12:36 | 18:40 | 12 h 07 min | 90.0° |
| April | 06:24 | 12:28 | 18:32 | 12 h 07 min | 78.4° |
| May | 06:22 | 12:26 | 18:30 | 12 h 08 min | 70.1° |
| June | 06:27 | 12:31 | 18:35 | 12 h 09 min | 66.9° |
| July | 06:32 | 12:36 | 18:40 | 12 h 08 min | 69.9° |
| August | 06:29 | 12:32 | 18:36 | 12 h 07 min | 78.3° |
| September | 06:19 | 12:22 | 18:26 | 12 h 06 min | 89.7° |
| October | 06:11 | 12:14 | 18:17 | 12 h 06 min | 78.9° |
| November | 06:12 | 12:15 | 18:18 | 12 h 06 min | 69.7° |
| December | 06:24 | 12:27 | 18:30 | 12 h 06 min | 66.2° |
A year of daylight in Isiolo
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Isiolo
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
1°collects the most energy over a year: 1798 kWh per kWp.
0°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | July kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° off-grid best = latitude | 1797 | 100% | 4.39 | 1.3× |
| 1° year-round best | 1798 | 100% | 4.36 | 1.3× |
| 15° | 1751 | 97% | 3.82 | 1.5× |
| 30° | 1605 | 89% | 3.03 | 1.9× |
| 45° | 1370 | 76% | 2.12 | 2.7× |
| 60° | 1073 | 60% | 1.24 | 4.3× |
| 70° | 883 | 49% | 1.01 | 4.8× |
| 90° | 575 | 32% | 0.96 | 3.3× |
A fixed array in Isiolo produces the most over a year at 1°. The design month for an off-grid system is July: at 0° it makes 4.39 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Isiolo at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 1° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 1° | Mean temp. |
|---|---|---|---|---|---|
| January | 6.43 | 5.33 | 4.44 | 5.23 | 21.8 °C |
| February | 6.82 | 4.51 | 3.73 | 5.51 | 22.9 °C |
| March | 6.64 | 3.12 | 2.56 | 5.34 | 23.5 °C |
| April | 6.06 | 1.81 | 1.46 | 4.87 | 22.7 °C |
| May | 6.08 | 1.18 | 0.93 | 4.88 | 22.1 °C |
| June | 5.59 | 1.26 | 1.00 | 4.48 | 21.4 °C |
| July | 5.41 | 1.28 | 1.01 | 4.36 | 20.9 °C |
| August | 5.82 | 1.40 | 1.12 | 4.70 | 21.2 °C |
| September | 6.55 | 2.42 | 1.97 | 5.29 | 22.3 °C |
| October | 6.21 | 3.66 | 3.02 | 5.03 | 22.5 °C |
| November | 5.68 | 4.34 | 3.61 | 4.62 | 21.6 °C |
| December | 5.91 | 5.10 | 4.25 | 4.82 | 21.3 °C |
| Year | 6.09 avg | 2.94 avg | 883 kWh | 1798 kWh |
Sizing example. To run a 1 kWh-per-day load through May on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 1,270 Wp of panels at 70°, versus 270 Wp at 1°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Isiolo
Distance between rows of 2 m long panels (slope length) so that no row shades the next between 10:00 and 14:00 solar time on the winter solstice.
1.6 mrow pitch at 70°
2.0 mrow pitch at 1°
How Isiolo compares in Kenya
Against the other 119 places in Kenya with climate data, for a fixed array at its best angle.
5thof 120 places in Kenya for sunshine: 6.10 peak sun hours a day on flat ground.
+5%solar energy a year compared with the average place in Kenya: 1,798 against 1,717 kWh per kWp.
−3 mindaylight on the longest day, compared with Nairobi: 12 h 09 min against 12 h 12 min.
1°best year-round tilt here; across Kenya it runs from 0° in Nairobi to 7° in Mandera.
Of the 120 places in Kenya, Lodwar gets the most sun (6.33 peak sun hours a day) and Taveta the least (5.47); Isiolo ranks 5th. In its darkest month, May, 1 kWp of off-grid panels at 70° makes 0.93 kWh a day here, against 0.99 kWh on average in Kenya. The shortest day lasts 12 h 06 min, +3 min compared with Nairobi.
Solar forecast for Isiolo, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
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Questions about the sun in Isiolo
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A free, live card for Isiolo: where the sun is right now on today's path, a countdown to sunset or sunrise, the daylight change, the moon phase at night and the best panel angle.
Sun positions: NREL Solar Position Algorithm. Climate: NASA POWER monthly climatology (NASA Langley Research Center). Forecast: Deutscher Wetterdienst, ICON-EU (CC BY 4.0), processed. Places: GeoNames (CC BY 4.0). Time zones: IANA. Sources and licences.