Distribution
Global horizontal irradiation, Beyla
- Mean
- 5.25 kWh/m²/day
- Annual total
- 1,917 kWh/m²/yr
- Highest
- February (6.03)
- Lowest
- July (3.83)
- Year-to-year variability
- ± 0.058 (1.1 %)
- Values
- 1,826 days
Monthly means of the daily values.
- Period mean
- Month above its normal
- Month below
- 12-month moving average
Drag across the chart to zoom, double-click to reset.
For each month, over 5 years: median, low and high years (P10 to P90) and extreme values.
- Median
- Low and high years (P10 to P90)
- Extreme values (min. to max.)
Mean of each complete year, as a gap to the period mean (5.25 kWh/m²/day).
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 5.96 | 6.03 | 5.71 | 5.91 | 5.69 | 5.19 | 3.78 | 3.65 | 4.23 | 5.42 | 5.02 | 5.26 | 5.15 |
| 2024 | 6.12 | 6.31 | 5.67 | 6.26 | 5.79 | 5.06 | 3.73 | 3.69 | 4.06 | 4.91 | 6.03 | 6.07 | 5.31 |
| 2023 | 5.99 | 5.90 | 5.57 | 5.83 | 5.61 | 4.52 | 4.46 | 4.18 | 4.87 | 5.11 | 5.16 | 5.83 | 5.25 |
| 2022 | 6.13 | 6.28 | 5.79 | 6.00 | 5.33 | 5.16 | 3.83 | 3.86 | 4.33 | 5.19 | 5.54 | 5.59 | 5.25 |
| 2021 | 5.88 | 5.82 | 5.68 | 5.95 | 5.76 | 5.32 | 4.02 | 4.06 | 4.49 | 5.36 | 5.48 | 5.58 | 5.28 |
| Median | 5.99 | 6.03 | 5.68 | 5.95 | 5.69 | 5.16 | 3.83 | 3.86 | 4.33 | 5.19 | 5.48 | 5.59 | |
| P10 | 5.91 | 5.85 | 5.61 | 5.86 | 5.44 | 4.73 | 3.75 | 3.67 | 4.13 | 4.99 | 5.08 | 5.39 | |
| P90 | 6.12 | 6.29 | 5.76 | 6.16 | 5.78 | 5.26 | 4.28 | 4.13 | 4.72 | 5.39 | 5.83 | 5.98 | |
| Min. | 5.88 | 5.82 | 5.57 | 5.83 | 5.33 | 4.52 | 3.73 | 3.65 | 4.06 | 4.91 | 5.02 | 5.26 | |
| Max. | 6.13 | 6.31 | 5.79 | 6.26 | 5.79 | 5.32 | 4.46 | 4.18 | 4.87 | 5.42 | 6.03 | 6.07 |
CSV file
1,826 rows, 69 KB. Columns: period, value, unit, confidence level, status.
date,valeur,unite,niveau_confiance,statut 2021-01-01,6.0015,kWh/m²/jour,B,brut 2021-01-02,5.9898,kWh/m²/jour,B,brut 2021-01-03,4.806,kWh/m²/jour,B,brutDownload the CSV
API
The same series, versioned, with a free key.
curl -H "Authorization: Bearer kuma_votre_cle" \ "https://api.kumascience.com/v1/series/gin_beyla_ghi_era5_land_2021_2025?format=csv"
Python
Read the published file directly with pandas.
import pandas as pd url = "https://kumascience.com/data/guinee/beyla/ghi_ecmwf_era5_land_journalier.csv" df = pd.read_csv(url) df.head()
Same variable, other sources
5 series published for this variable in Beyla. The gap compares period means, which do not always cover the same years.
| Source | Period | Step | Mean (kWh/m²/day) | Gap | 5.165.72 |
|---|---|---|---|---|---|
| NASA POWER | 1991-2020 | monthly | 5.24 | −0.1 % | |
| ERA5-Land | 2001-2020 | monthly | 5.16 | −1.8 % | |
| PVGIS-SARAH-3 | 2021-2023 | monthly | 5.72 | +8.9 % | |
| ERA5-Land this record | 2021-2025 | daily | 5.25 | reference | |
| NASA POWER | 2021-2025 | daily | 5.24 | −0.2 % |
Notes
- Method
- Satellite model
- Unit
- kWh/m²/day
- Time step
- Daily, charts and table as monthly means
- Period
- 2021-01-01 - 2025-12-31
- Kuma qualification
- Acceptable qualification, cross-check series
- Source licence
- Licence à vérifier auprès de la source amont avant réutilisation.
- Kuma licence
- CC-BY 4.0, DOI 10.5281/zenodo.21051755
Cite this series
Kuma Science (2026). Global horizontal irradiation, Beyla (Guinea), 2021-2025. ERA5-Land series, Guinea national energy data reference. DOI 10.5281/zenodo.21051755. https://kumascience.com/en/donnees/gin_beyla_ghi_era5_land_2021_2025
@misc{kuma_gin_beyla_ghi_era5_land_2021_2025,
author = {{Kuma Science}},
title = {Global horizontal irradiation, Beyla (Guinea), 2021-2025},
year = {2026},
howpublished = {ERA5-Land series},
doi = {10.5281/zenodo.21051755},
url = {https://kumascience.com/en/donnees/gin_beyla_ghi_era5_land_2021_2025},
note = {License CC-BY 4.0}
}TY - DATA AU - Kuma Science TI - Global horizontal irradiation, Beyla (Guinea), 2021-2025 PY - 2026 PB - Kuma Science DO - 10.5281/zenodo.21051755 UR - https://kumascience.com/en/donnees/gin_beyla_ghi_era5_land_2021_2025 N1 - ERA5-Land ER -
Also cite the primary source, whose licence applies to the published values.
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