Direct normal irradiation, Beyla
- Mean
- 2.97 kWh/m²/day
- Annual total
- 1,083 kWh/m²/yr
- Highest
- December (4.51)
- Lowest
- August (1.69)
- Year-to-year variability
- ± 0.141 (4.8 %)
- Values
- 240 months
- Monthly value
- 12-month moving average
- 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 20 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 (2.97 kWh/m²/day).
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 4.22 | 3.99 | 2.89 | 2.58 | 2.72 | 2.25 | 1.54 | 1.84 | 2.16 | 3.94 | 5.02 | 4.53 | 3.14 |
| 2019 | 5.19 | 4.11 | 3.53 | 2.51 | 2.81 | 2.16 | 1.84 | 1.71 | 1.75 | 2.80 | 4.37 | 5.69 | 3.21 |
| 2018 | 3.81 | 3.23 | 3.47 | 2.30 | 2.43 | 1.94 | 1.69 | 1.40 | 2.10 | 3.20 | 3.38 | 5.16 | 2.84 |
| 2017 | 5.29 | 3.16 | 3.35 | 3.16 | 2.36 | 2.13 | 2.05 | 1.67 | 2.31 | 3.91 | 3.60 | 3.87 | 3.07 |
| 2016 | 3.42 | 3.01 | 3.85 | 3.28 | 2.66 | 2.17 | 1.60 | 1.63 | 1.98 | 3.02 | 3.41 | 4.01 | 2.84 |
| 2015 | 3.71 | 4.01 | 3.40 | 2.27 | 2.71 | 1.76 | 2.09 | 1.66 | 2.35 | 3.07 | 4.33 | 3.78 | 2.93 |
| 2014 | 4.03 | 3.88 | 2.99 | 3.29 | 2.47 | 2.10 | 2.10 | 1.51 | 2.11 | 3.36 | 3.30 | 4.82 | 3.00 |
| 2013 | 5.02 | 3.89 | 3.55 | 3.26 | 2.60 | 2.16 | 2.18 | 1.54 | 2.25 | 2.86 | 4.22 | 4.79 | 3.20 |
| 2012 | 5.04 | 2.89 | 2.41 | 2.72 | 2.54 | 1.89 | 1.64 | 1.84 | 2.09 | 2.72 | 3.62 | 4.55 | 2.83 |
| 2011 | 3.41 | 4.20 | 3.26 | 2.87 | 2.66 | 1.83 | 1.59 | 1.64 | 2.29 | 2.90 | 3.87 | 4.40 | 2.91 |
| 2010 | 4.91 | 3.86 | 2.00 | 2.27 | 2.37 | 2.07 | 1.77 | 1.71 | 1.95 | 2.54 | 3.64 | 3.94 | 2.75 |
| 2009 | 4.18 | 2.97 | 2.89 | 2.85 | 2.89 | 2.28 | 1.79 | 1.38 | 2.18 | 2.80 | 3.80 | 4.49 | 2.88 |
| 2008 | 5.24 | 2.94 | 3.02 | 2.34 | 2.83 | 2.26 | 1.80 | 1.74 | 1.87 | 2.93 | 4.07 | 4.42 | 2.96 |
| 2007 | 2.90 | 3.91 | 2.65 | 2.39 | 2.67 | 2.75 | 2.08 | 1.72 | 1.93 | 3.05 | 3.53 | 4.45 | 2.84 |
| 2006 | 4.70 | 3.82 | 2.89 | 2.27 | 2.45 | 2.26 | 2.14 | 1.89 | 2.02 | 3.20 | 4.73 | 4.44 | 3.07 |
| 2005 | 2.96 | 2.74 | 2.84 | 2.49 | 2.63 | 1.72 | 2.35 | 1.90 | 2.65 | 3.32 | 3.37 | 4.56 | 2.79 |
| 2004 | 4.39 | 2.63 | 2.07 | 2.14 | 2.11 | 2.12 | 2.05 | 2.25 | 2.84 | 3.79 | 3.99 | 3.56 | 2.83 |
| 2003 | 4.04 | 4.33 | 3.35 | 3.21 | 2.84 | 1.66 | 1.63 | 1.19 | 2.25 | 3.39 | 3.60 | 4.91 | 3.03 |
| 2002 | 3.88 | 4.10 | 3.32 | 2.53 | 2.53 | 2.15 | 1.78 | 1.99 | 2.41 | 3.55 | 4.15 | 5.06 | 3.12 |
| 2001 | 4.72 | 4.34 | 3.50 | 2.93 | 2.91 | 2.08 | 1.54 | 1.39 | 2.11 | 3.30 | 3.35 | 4.76 | 3.08 |
| Median | 4.20 | 3.87 | 3.14 | 2.55 | 2.64 | 2.12 | 1.80 | 1.69 | 2.14 | 3.13 | 3.72 | 4.51 | |
| P10 | 3.36 | 2.88 | 2.37 | 2.27 | 2.36 | 1.76 | 1.59 | 1.39 | 1.92 | 2.79 | 3.37 | 3.86 | |
| P90 | 5.20 | 4.21 | 3.53 | 3.27 | 2.85 | 2.26 | 2.15 | 1.91 | 2.44 | 3.80 | 4.41 | 5.07 | |
| Min. | 2.90 | 2.63 | 2.00 | 2.14 | 2.11 | 1.66 | 1.54 | 1.19 | 1.75 | 2.54 | 3.30 | 3.56 | |
| Max. | 5.29 | 4.34 | 3.85 | 3.29 | 2.91 | 2.75 | 2.35 | 2.25 | 2.84 | 3.94 | 5.02 | 5.69 |
CSV file
240 rows, 8 KB. Columns: period, value, unit, confidence level, status.
annee,mois,valeur,unite,niveau_confiance,statut 2001,1,4.721,kWh/m²/jour,B,brut 2001,2,4.3392,kWh/m²/jour,B,brut 2001,3,3.5002,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_dni_power_2001_2020?format=csv"
Python
Read the published file directly with pandas.
import pandas as pd url = "https://kumascience.com/data/guinee/beyla/dni_nasa_power_mensuel.csv" df = pd.read_csv(url) df.head()
Same variable, other sources
4 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 | 2.974.70 |
|---|---|---|---|---|---|
| NASA POWER this record | 2001-2020 | monthly | 2.97 | reference | |
| CAMS Radiation | 2004-2020 | monthly | 4.44 | +49.7 % | |
| CAMS Radiation | 2021-2023 | monthly | 4.70 | +58.6 % | |
| NASA POWER | 2021-2025 | daily | 3.11 | +4.7 % |
Notes
- Method
- Satellite model
- Unit
- kWh/m²/day
- Time step
- Monthly
- Period
- 2001-01-01 - 2020-12-31
- Kuma qualification
- Acceptable qualification, cross-check series
- Source licence
- NASA Open Data Policy, domaine public, citation recommandée
- Kuma licence
- CC-BY 4.0, DOI 10.5281/zenodo.21051755
Cite this series
Kuma Science (2026). Direct normal irradiation, Beyla (Guinea), 2001-2020. NASA POWER series, Guinea national energy data reference. DOI 10.5281/zenodo.21051755. https://kumascience.com/en/donnees/gin_beyla_dni_power_2001_2020
@misc{kuma_gin_beyla_dni_power_2001_2020,
author = {{Kuma Science}},
title = {Direct normal irradiation, Beyla (Guinea), 2001-2020},
year = {2026},
howpublished = {NASA POWER series},
doi = {10.5281/zenodo.21051755},
url = {https://kumascience.com/en/donnees/gin_beyla_dni_power_2001_2020},
note = {License CC-BY 4.0}
}TY - DATA AU - Kuma Science TI - Direct normal irradiation, Beyla (Guinea), 2001-2020 PY - 2026 PB - Kuma Science DO - 10.5281/zenodo.21051755 UR - https://kumascience.com/en/donnees/gin_beyla_dni_power_2001_2020 N1 - NASA POWER ER -
Also cite the primary source, whose licence applies to the published values.
Astuce pratique · Pour citer cette fiche dans un rapport BE ou un livrable client, sélectionnez le bloc ci-dessus puis copiez-collez. Le slug de la série (le code présent dans l'URL) garantit la reproductibilité : la même URL pointera vers la même série, même après mises à jour des données amont (l'historique versionné côté Data Core est préservé).
Besoin d'aller plus loin sur cette série ? Le cabinet Kuma accompagne bureaux d'études, bailleurs et porteurs de projet sur l'ingénierie énergétique appliquée · audit, dimensionnement PV, conseil stratégique.